What causes fatigue, nausea, upset stomach, and weakness? How to identify the underlying reasons and get the right treatment. Discover the potential conditions associated with these symptoms.

Unraveling the Mystery of Fatigue, Nausea, Upset Stomach, and Weakness

Feeling tired, nauseous, with an upset stomach and a generalized sense of weakness can be a disconcerting experience. These symptoms can have a range of underlying causes, from simple lifestyle factors to more complex medical conditions. Understanding the potential reasons behind these symptoms is crucial for seeking the appropriate treatment and regaining your health.

Identifying the Culprit: Exploring the Causes of Fatigue, Nausea, Upset Stomach, and Weakness

What could be the driving force behind these troubling symptoms? Let’s delve into the potential causes:

Stress and Burnout

Prolonged stress and feelings of burnout can take a significant toll on your physical and mental well-being, leading to a combination of fatigue, nausea, stomach upset, and a general sense of weakness.

Digestive Issues

Gastrointestinal problems, such as irritable bowel syndrome (IBS), gastroenteritis, or even food poisoning, can often manifest as nausea, upset stomach, and a lack of energy.

Hormonal Imbalances

Fluctuations in hormone levels, particularly in conditions like thyroid disorders or diabetes, can contribute to the development of fatigue, nausea, and other related symptoms.

Viral Infections

Viral illnesses, such as the flu or a stomach bug, can trigger a cascade of symptoms, including fatigue, nausea, and digestive distress.

Medication Side Effects

Certain medications, both prescription and over-the-counter, can induce side effects that include fatigue, nausea, and gastrointestinal issues.

Dehydration and Nutrient Deficiencies

Inadequate fluid intake or a lack of essential nutrients in your diet can lead to symptoms like fatigue, nausea, and weakness.

Unraveling the Connections: How These Symptoms Intertwine

Fatigue, nausea, upset stomach, and weakness are often interconnected, with one symptom potentially exacerbating or contributing to the others. For instance, persistent nausea can lead to a decreased appetite and poor nutrient intake, ultimately resulting in feelings of fatigue and weakness.

Conversely, underlying medical conditions that cause fatigue, such as anemia or thyroid disorders, may also trigger nausea and digestive distress. Understanding these intricate relationships can help you and your healthcare provider identify the root cause and develop an effective treatment plan.

Seeking Relief: Strategies for Managing Fatigue, Nausea, Upset Stomach, and Weakness

Addressing the underlying causes of these symptoms is crucial for finding relief and restoring your overall well-being. Some potential strategies include:

Lifestyle Adjustments

Adopting healthier habits, such as getting enough sleep, managing stress, and maintaining a balanced diet, can help alleviate the symptoms and promote better overall health.

Medication and Supplements

In some cases, prescription medications or over-the-counter remedies may be necessary to address specific conditions contributing to the symptoms. Certain supplements, such as probiotics or electrolyte-replenishing beverages, can also provide relief.

Medical Evaluation and Diagnosis

If the symptoms persist or worsen, it’s essential to seek professional medical attention. A comprehensive evaluation by a healthcare provider can help identify the underlying cause and develop a targeted treatment plan.

Empowering Yourself: Understanding the Symptom Checker and Its Capabilities

The WebMD Symptom Checker with Body Location feature can be a valuable tool in your journey to understand and manage your symptoms. Let’s explore how you can make the most of this resource:

Navigating the Body Regions and Sub-Regions

The symptom checker offers 11 primary body regions and 41 sub-regions, allowing you to pinpoint the specific location of your symptoms with greater accuracy. This level of detail can provide valuable insights into the potential underlying causes.

Searching for Symptoms and Conditions

Whether you’re unsure about the specific body area or your symptom is not location-specific, the symptom checker provides versatile search options. You can search for your symptoms directly or explore the “General Symptoms” and “Skin Symptoms” categories.

Interpreting the Results

The symptom checker prioritizes the most common conditions associated with your selected symptoms, while also providing a comprehensive list of all potential conditions. Remember, this tool is intended for informational purposes only and should not replace professional medical advice.

Empowered and Informed: Taking the Next Steps

By understanding the potential causes of fatigue, nausea, upset stomach, and weakness, and utilizing the resources available through the WebMD Symptom Checker, you can take proactive steps towards improving your health and well-being. Remember, these symptoms can have a range of underlying causes, and seeking professional medical guidance is crucial for obtaining an accurate diagnosis and effective treatment.

Embark on your journey to wellness with confidence, armed with the knowledge and tools to navigate these complex symptoms. Your path to better health starts here.

Symptom Checker with Body from WebMD

NEW: This symptom checker now includes the ability to select symptoms by body location. We hope this makes it easier for you to identify your symptoms and possible conditions.

The tool also allows you to select multiple symptoms quickly. Click to see FAQs and tips for searching

1) How many body sections are there?

• There are 11 primary body regions and 41 sub-regions from which you can choose. For example, the arm is a primary region, and your elbow is a more specific sub-region. The ability to choose sub-regions allows you to more precisely specify your symptoms.

2) What should I do if I’m not sure which body area to choose?

• Since all symptoms in a sub-region (example “elbow”) are also listed in the primary body region (example “arm”), it is best to start with the primary body region if you are unsure exactly where the symptom is on your body.

3) What if my symptom isn’t associated with a specific body location (for example, “chills”)?

• If you are not sure what body area your symptom falls under, you can type your symptom in the main search box or select the “General Symptoms” category.

• There is also a separate section for skin symptoms only.

4) What if I don’t see my symptom on the list?

• When a body location is selected, the “most common symptoms” are displayed first, but you can also switch tabs to see “All” symptoms.

• You can also use the category-specific search box to search for all symptoms in that category.

• The search box on the main page includes ALL symptoms in all categories.

5) What if I can’t find my condition or my medication on the “Questions” page?

•If your condition or medication is not displayed in the type-ahead list, we don’t have enough information about it to factor it into the results. If you don’t see it, skip that field.

• All questions are optional, you can always skip directly to results.

6) Are there any other tips for using this symptom checker?

• If you need to go back to a previous page, please use the “back” or “previous” buttons within the tool. Do not use the back button on your browser or phone. You could lose the symptoms you entered.

• Results are ordered by how closely your symptoms match a condition AND how common it is (in the United States). Extremely rare conditions may not surface in this tool. You should always consult a doctor for specific concerns.

• We strongly suggest entering more than 1 symptom. It will likely improve your results.

This tool does not provide medical advice It is intended for informational purposes only. It is not a substitute for professional medical advice, diagnosis or treatment. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

Symptom Checker with Body from WebMD

NEW: This symptom checker now includes the ability to select symptoms by body location. We hope this makes it easier for you to identify your symptoms and possible conditions.

The tool also allows you to select multiple symptoms quickly. Click to see FAQs and tips for searching

1) How many body sections are there?

• There are 11 primary body regions and 41 sub-regions from which you can choose. For example, the arm is a primary region, and your elbow is a more specific sub-region. The ability to choose sub-regions allows you to more precisely specify your symptoms.

2) What should I do if I’m not sure which body area to choose?

• Since all symptoms in a sub-region (example “elbow”) are also listed in the primary body region (example “arm”), it is best to start with the primary body region if you are unsure exactly where the symptom is on your body.

3) What if my symptom isn’t associated with a specific body location (for example, “chills”)?

• If you are not sure what body area your symptom falls under, you can type your symptom in the main search box or select the “General Symptoms” category.

• There is also a separate section for skin symptoms only.

4) What if I don’t see my symptom on the list?

• When a body location is selected, the “most common symptoms” are displayed first, but you can also switch tabs to see “All” symptoms.

• You can also use the category-specific search box to search for all symptoms in that category.

• The search box on the main page includes ALL symptoms in all categories.

5) What if I can’t find my condition or my medication on the “Questions” page?

•If your condition or medication is not displayed in the type-ahead list, we don’t have enough information about it to factor it into the results. If you don’t see it, skip that field.

• All questions are optional, you can always skip directly to results.

6) Are there any other tips for using this symptom checker?

• If you need to go back to a previous page, please use the “back” or “previous” buttons within the tool. Do not use the back button on your browser or phone. You could lose the symptoms you entered.

• Results are ordered by how closely your symptoms match a condition AND how common it is (in the United States). Extremely rare conditions may not surface in this tool. You should always consult a doctor for specific concerns.

• We strongly suggest entering more than 1 symptom. It will likely improve your results.

This tool does not provide medical advice It is intended for informational purposes only. It is not a substitute for professional medical advice, diagnosis or treatment. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

Self-care: Self-care: Lenta.ru

Oncologist Vasilyeva: weakness and nausea are the main side effects of chemotherapy SM-Clinic” Elizaveta Vasilyeva. In an interview with Lenta.ru, she named methods of dealing with the side effects of cancer drugs.

Drugs capable of killing cancer cells are usually highly toxic, the oncologist explained, so chemotherapy courses in most cases are accompanied by side effects. The good news, according to Vasilyeva, is that doctors know how to alleviate the patient’s condition.

Fatigue and weakness

Weakness is one of the first side effects that patients experience during chemotherapy. Fatigue, lethargy and apathy after therapy is absolutely normal, the doctor said. But each person has a different level of energy, so chemotherapy affects each patient in different ways. Recovery can take several months, or maybe a year or more.

However, according to the oncologist, it is possible to recover and return to a normal life by following simple rules. The first step is to listen to the body and rest as soon as the need arises, advised Vasilyeva. You also need to soberly assess your energy level and regularly replenish it through any activity that gives pleasure.

It is useful to plan everything in advance, mentally marking actions as “important” and “unimportant”, so that if necessary, “unimportant” can be canceled

Elizaveta Vasilyeva oncologist . Relaxing workouts should be chosen, such as yoga or Pilates.

Related materials:

During recovery after chemotherapy, it is very important to eat tasty and varied, so that the body receives all the vitamins and minerals it needs, Vasilyeva noted.

Nausea and vomiting

Cancer treatment often comes with unpleasant symptoms such as nausea and vomiting. Depending on the characteristics of the patient’s body and the treatment regimen, nausea can persist from several hours to several weeks, Vasilyeva warned. In this case, doctors prescribe antiemetic drugs, but a person can help himself on his own.

“An empty stomach increases the feeling of nausea. Therefore, you need to eat at least a little. And it is better to do it at a time when you feel less sick. At the same time, chew carefully every bite, without being distracted by gadgets and TV, ”recommended the interlocutor of Lenta.ru.

Aromas of hot food may induce vomiting. Therefore, it is better to eat dishes at room temperature or completely cold.
The doctor advised me to lie down with my head elevated for a few minutes after eating, so as not to provoke an attack of nausea

According to Vasilyeva, many patients undergoing chemotherapy say that food changes taste during treatment. This will pass over time, but tart and sour fruits can reduce the unpleasant taste sensation, as they reduce the metallic taste. Chilled foods can be perceived as tastier, and rinsing your mouth with water before eating can improve the taste of food, the oncologist noted.

Previously, Danail Nazliev, an oncologist-mammologist, called orgasms one of the methods of fighting breast cancer. He noted that during intimacy, hormones are produced that enhance the body’s defenses.

how to recover, get rid of asthenic syndrome and gain strength after ARVI and influenza

Weakness after an illness is normal, because the body has spent a lot of energy fighting the infection. But if the feeling of fatigue does not go away even after rest, occurs not only after physical, but also after mental activity, and is also combined with apathy, this is not weakness, but asthenic syndrome ¹ . We figured out why it occurs, how to get rid of it and what to do so that it does not arise again.

Causes of weakness after illness

The exact cause of the appearance of asthenic syndrome after infection has not yet been established. But there are several suggestions why the weakness appears:

● Inflammation of brain tissue. The signal about the spread of the infection gets to the brain, which activates immunologically sensitive cells and the release of cytokines – special proteins that help fight the disease. An inflammatory reaction occurs in the brain, provoking asthenia ² .

● Energy deficiency against the background of hypoxia – lack of oxygen in the blood. Hypoxia appears due to the accumulation of microbial toxins and intoxication with metabolic products, in particular oxidation reactions. Oxygen is absorbed worse by tissues, protein metabolism is disturbed, ammonia accumulates in the blood. This negatively affects the state of the central nervous system – nerve impulses are transmitted more slowly, it becomes more difficult for a person to do mental work and perform ordinary household chores ³ .

In addition, asthenia is also associated with the characteristics of the influenza virus. It suppresses the immune system and directly affects the cells of the nervous system – these features increase the risk of developing asthenic syndrome ^{4, 5} .

Antiviral drugs are indicated to fight influenza viruses. One of them is the modern drug Nobasit ^® Forte containing enisamium iodide. ⁶ It effectively suppresses the action of influenza viruses and other pathogens of acute respiratory viral infections (ARVI) ⁶ . Additionally, enisamia iodide has an anti-inflammatory effect comparable to that of ibuprofen ⁷ . It is recommended to start treatment with Nobasit ^® Forte as early as possible – when the first symptoms of the disease ⁶ appear.

Symptoms of asthenic syndrome

Asthenic syndrome occurs due to the action of infection on brain cells. This is not just a weakness, but a neurological disorder. Problems in the work of the nervous system cause physical and emotional-psychological symptoms.

Physical symptoms of asthenic syndrome ⁸ :

● Increased fatigue;

● muscle weakness;

● loss of appetite;

● digestive disorders;

● Pain in joints and bones;

● nausea;

● abdominal pain;

● tachycardia ⁹ ;

● pain in the heart;

● increased sweating;

● decreased libido;

● irregular menstruation ¹⁰ ;

● periodic rise in body temperature.

The main problem of asthenic syndrome is the loss of working capacity. Mental or physical stress worsens a person’s condition, which causes anxiety and a feeling of powerlessness ¹¹ .

Due to damage to the nervous system, neurological symptoms occur ¹² :

● headache;

● meteorological dependence ¹³ ;

● heaviness and pressure in the head;

● dizziness;

● sudden mood swings;

● tearfulness;

● problems with self-control;

● restlessness and impatience;

● sleep disturbance – insomnia, early awakening or drowsiness, including daytime;

● photophobia;

● intolerance to loud sounds;

● increased sensitivity to touch;

● decrease in memory and attention;

● Anxiety.

The most common symptoms are fatigue, which occurs in 58% of patients after the flu, and headache, in 44% of patients. Attention disturbance and other manifestations are much less common ¹⁴ .

Typically, symptoms persist for four weeks to seven months. The duration depends on the severity of the disease ¹⁵ .

How to restore strength

You can start rehabilitation from asthenic syndrome on your own. If self-help methods do not help, you should consult a doctor – he will prescribe physiotherapy and drugs for recovery.

Self-help methods

It is difficult for patients with asthenia to endure physical activity, but it is recommended to start recovery with it. Scientists believe that physical inactivity aggravates the course of asthenia, and studies ¹⁶ prove the benefits of treatment with dosed physical activity. Gradually increasing the load, the patient will feel better and restore activity ¹⁷ .

It is worth starting recovery with walking, while monitoring the pulse. There are 3 walking modes:

● gentle — up to 1 km;

● gentle training — up to 1.5 km;

● training — up to 3 km.

You need to start from the first, gradually moving to higher levels. The mode is changed taking into account well-being and a conversational test:

● if a person easily pronounces a whole sentence, then the intensity level is low and you need to increase the intensity of walking;

● if in the second sentence a person has slight shortness of breath, then the level of intensity of walking is chosen correctly;

● In cases where the practitioner can only speak one or a few words, the intensity level is high, and it is better to reduce the intensity of walking ¹⁸ .

Additionally, nutritional treatment, that is, diet therapy, is connected. It helps to restore strength after suffering the flu ¹⁹ . You need to eat 4-5 times a day.

The diet should be low in calories and high in protein. Fast carbohydrates are excluded from the menu: sugar, confectionery, carbonated drinks and store juices, hot sauces, marinade, canned food and pickles. Vegetables with a lot of coarse fiber, such as radishes, radishes, legumes, garlic and horseradish, are also not recommended ²⁰ .

Recommended daily KBJU for asthenic syndrome:

● 20–30 kcal/kg;

● not less than 0.83 g of protein per 1 kg of weight;

● 80–85 g of fat;

● 350-400 g of carbohydrates.

It is also important to observe the drinking regimen. It is recommended to drink at least 1.5-2 liters of fluid per day.

What a doctor can prescribe

Diet therapy and physical activity are recommended to be combined with psychotherapy. It is better to choose cognitive behavioral therapy, as the effectiveness of this method has been proven in clinical trials. It helps people re-motivate and relieve symptoms of fatigue ²¹ .

In other trials, sensory therapy shows a positive effect. This is an art therapy that combines healing with music, aromas and color. This option of unloading improves the psychological and emotional state, reduces anxiety, eliminates apathy and sleep problems ²² .

Physiotherapy helps to get rid of asthenic syndrome ²³ :

● hydrotherapy — swimming, contrast shower, Charcot shower;

● therapeutic gymnastics;

● breathing exercises using respiratory simulators;

● massage;

● acupuncture;

● hyperbaric oxygen – high pressure oxygen breathing ²⁴ ;

● low-frequency, high-frequency pulsed magnetotherapy;

● drug electrophoresis;

● treatment with sinusoidal modulated currents;

● Ultrasound therapy;

● laser therapy;

● Normobaric interval hypoxic-hyperoxic training – alternating breathing with large and small amounts of oxygen ²⁵ .

Treatment is carried out within six months after recovery from influenza.

Separately consider vitamin therapy. According to the study, vitamin D deficiency is often observed in patients with asthenic syndrome. One month after the start of taking 100,000 IU of vitamin D, the symptoms of depression and anxiety become less pronounced ²⁶ . It is also recommended to take vitamin B6 ²⁷ , C and P ²⁸ , as well as multivitamins ²⁹ .

To alleviate the symptoms of asthenia, medicines are also used:

● acetyl-L-carnitine ³⁰ — a substance that can protect nerve cells from damage and restore them;

● Magnesium preparations ³¹ ;

● nootropics – drugs that improve brain metabolism ³² ;

● adaptogens – substances that enhance the body’s ability to resist stress and toxic substances;

● neuroprotectors – drugs that protect nerve cells from the action of internal and external damaging factors;

● Antioxidants – substances that prevent free radical damage to cells ³³ .

An integrated approach to treatment will help to quickly restore strength and get rid of asthenic syndrome.

Prevention of re-infection with influenza

The most effective way to reduce the risk of getting the flu is to get vaccinated ³⁴ . General prevention of viral diseases is divided into drug – with the help of drugs, and non-drug – without them.

How to protect yourself from the flu without medication:

● treat the air with low doses of ozone using the ozonator ³⁵ ;

● regularly ventilate the room ³⁶ ;

● use antiseptics;

● Wear masks and other personal protective equipment in crowded places.

For more effective prevention during periods of high incidence, drugs are used:

● antiseptics, which wash off the causative agents of SARS from the nose and throat;

● leukocyte interferons – artificial proteins that work like natural human immune substances, but can cause side effects;

● interferon inducers ³⁷ – increase the production of their own interferons and increase immunity.

Briefly about the main

➢ Asthenic syndrome is a weakness after an illness that does not go away even after rest and occurs after mental or minor physical activity.

➢ Asthenic syndrome occurs due to systemic inflammation, decreased immunity, virus damage to brain cells and energy deficiency against the background of hypoxia.

➢ The symptoms of asthenic syndrome are physical, for example, fatigue, pain in the abdomen and heart, as well as neurological – they include dizziness, anxiety, apathy, mood swings and others.

➢ To restore strength after an illness, vitamin therapy, diet therapy, physiotherapy and taking various groups of drugs helps.

➢ For the prevention of SARS and influenza, it is recommended to wear masks, ozonize and regularly ventilate the room. Medical methods of prevention include the use of antiseptics, as well as other drugs – for example, interferons and interferon inducers.

¹ Schukin I. A. Correction of asthenic syndrome. Medical alphabet. The hospital is everything for health care facilities. 2013;4:38-44.

² Yu.D. Vorobieva, G.M. Dyukova Asthenic syndrome in the context of the COVID-19 pandemic. Medical alphabet. Neurology and psychiatry. 2020;33(4): 26-34

³ Ebzeeva E.Yu., Ostroumova O.D., Mironova E.V. Efficacy and safety of Mildronate in post-infectious asthenic syndrome (clinical examples). Medical alphabet. Modern clinic. 2020;2(1): 61-66.

⁴ Golubovskaya O.A., Gudzenko O.A., Shestakova I.V., Gainutdinova T.I., Levchuk O.O. Post-infectious asthenic syndrome and the possibility of its correction. “Neurology and neurosurgery. Eastern Europe”. 2019;9(1):128-136.

⁵ Bogolepova A.N., Osinovskaya N.A., Kovalenko E.A., Makhnovich E.V. Possible approaches to the treatment of asthenic and cognitive impairments in post-COVID syndrome. Neurology, neuropsychiatry, psychosomatics. 2021;13(4):88–93.

⁶ Instructions for medical use of the drug Nobasit ^® Forte LP-006416

⁷ Zyryanov S.K., Butranova O.I., Gaidai D.S., Kryshen K.L. Pharmacotherapy of acute respiratory infections caused by influenza viruses: modern possibilities. Therapeutic archive, №1 – 2021

⁸ Golubovskaya O.A., Gudzenko O.A., Shestakova I.V., Gainutdinova T.I., Levchuk O.O. Post-infectious asthenic syndrome and the possibility of its correction. “Neurology and neurosurgery. Eastern Europe”. 2019;9(1): 128-136.

⁹ Ebzeeva E.Yu., Ostroumova O.D., Mironova E.V. Efficacy and safety of Mildronate in post-infectious asthenic syndrome (clinical examples). Medical alphabet. Modern clinic. 2020;2(1): 61-66.

¹⁰ Yu.D. Vorobieva, G.M. Dyukova Asthenic syndrome in the context of the COVID-19 pandemic. Medical alphabet. Neurology and psychiatry. 2020;33(4):26-34.

¹¹ Schukin I. A. Correction of asthenic syndrome. Medical alphabet. The hospital is everything for health care facilities. 2013;4:38-44.

¹² Kotova O.V., Akarachkova E.S. Asthenic syndrome in the practice of a neurologist and a family doctor. breast cancer. 2016;13: 824–829.

¹³ Akhapkina VI, Fedin AI, Avedisova AS, Akhapkin RV Efficacy of Phenotropil in the treatment of asthenic syndrome and chronic fatigue syndrome. “Recipe”. 2008;5(61): 79-84.

¹⁴ Bogolepova AN Possible approaches to the treatment of asthenic and cognitive disorders in post-COVID syndrome. Behavioral neuroscience. 2022;1:52-54.

¹⁵ Aitbaev K.A., Murkamilov I.T., Murkamilova Zh.A., Fomin V.V., Kudaibergenova I.O., Yusupov F.A. Postcovid syndrome: frequency, clinical spectrum and challenges for the outpatient service. Practical medicine. 2021;19(5):15-20.

¹⁶ Ebzeeva E.Yu., Ostroumova O.D., Mironova E.V. Efficacy and safety of Mildronate in post-infectious asthenic syndrome (clinical examples). Medical alphabet. Modern clinic. 2020;2(1): 61-66.

¹⁷ Lane R. Chronic fatigue syndrome: is it physical? J Neurol Neurosurg Psychiatry. 2000 Sep;69(3):289. doi:10.1136/jnnp.69.3.289

¹⁸ Meshcheryakov A.V., Sarsania S.K., Konikova A.A. Adaptation to physical activity of the elderly using dosed walking. Volga pedagogical search (scientific journal). 2020;1(31): 50-57.

¹⁹ Ochkolyas MV, Galvas N. Yu., Kharitonenko KA Method of hyperbaric oxygenation in complex treatment and rehabilitation of post-covid syndrome: new experience and achievements. Marine medicine. 2022;8(1):94-98.

²⁰ Marchenkova L.A., Makarova E.V., Yurova O.V. The role of micronutrients in the complex rehabilitation of patients with a new coronavirus infection СOVID-19. Nutrition issues. 2021;90(2): 40–49.

²¹ Yu.D. Vorobieva, G.M. Dyukova Asthenic syndrome in the context of the COVID-19 pandemic. Medical alphabet. Neurology and psychiatry. 2020;33(4):26-34.

²² Genova N.M., Zakharova I.E. The use of art therapy technologies to overcome the post-COVID syndrome: psychological and pedagogical aspects. International research journal. 2022;6(120):22-25.

²³ Ebzeeva E.Yu., Ostroumova O.D., Mironova E.V. Efficacy and safety of Mildronate in post-infectious asthenic syndrome (clinical examples). Medical alphabet. Modern clinic. 2020;2(1): 61-66.

²⁴ Ochkolyas MV, Galvas N. Yu., Kharitonenko KA Method of hyperbaric oxygenation in complex treatment and rehabilitation of post-COVID syndrome: new experience and achievements. Marine medicine. 2022;8(1):94-98.

²⁵ Bralyuk MA, Akinina EG, Voronova OA Analysis of the results of using normobaric interval hypoxic-hyperoxic training in patients with post-covid syndrome. Chief Physician. 2022;1(82): 37-40.

²⁶ Yu.D. Vorobieva, G. M. Dyukova Asthenic syndrome in the context of the COVID-19 pandemic. Medical alphabet. Neurology and psychiatry. 2020;33(4):26-34.

²⁷ golepova AN Possible approaches to the treatment of asthenic and cognitive impairments in post-covid syndrome. Behavioral neuroscience. 2022;1:52-54.

²⁸ golepova AN Possible approaches to the treatment of asthenic and cognitive impairments in post-covid syndrome. Behavioral neuroscience. 2022;1:52-54.

²⁹ Shishkova V.N., Martynov A.I. New opportunities in the treatment of asthenic symptoms after a new coronavirus infection. Medical advice. 2022;16(6): 24–35.

³⁰ Schukin I.A. Correction of asthenic syndrome. Medical alphabet. The hospital is everything for health care facilities. 2013;4:38-44.

³¹ Bogolepova AN Possible approaches to the treatment of asthenic and cognitive disorders in post-COVID syndrome. Behavioral neuroscience.