What causes a persistent low-grade fever? How do you treat a low-grade fever that lasts for days? Get the answers to these questions and more.

Understanding Persistent Low-Grade Fever

A persistent low-grade fever is defined as a body temperature that is slightly elevated, typically between 98.7째F (37.05째C) and 100.4째F (38.0째C), and lasts for more than 24 hours. These fevers are often associated with viral or bacterial infections, stress, certain medications, or underlying health conditions like thyroid issues or autoimmune diseases.

Causes of Persistent Low-Grade Fever

Respiratory Infections

Viral infections like the common cold can cause a low-grade fever that lasts for more than a few days. Other respiratory infections such as viral pneumonia and bronchitis can also lead to a persistent low-grade fever, accompanied by symptoms like chills, sore throat, and a persistent cough.

Urinary Tract Infections (UTIs)

A persistent low-grade fever can be a sign of a hidden urinary tract infection in both children and adults. UTIs can cause a fever, along with other symptoms like pain or discomfort when urinating.

Stress and Certain Medications

Stress and certain medications, such as some antibiotics or blood pressure drugs, can also trigger a persistent low-grade fever in some individuals.

Underlying Health Conditions

Persistent low-grade fevers can also be a symptom of more serious underlying health conditions, like thyroid disorders or autoimmune diseases. These conditions can cause the body’s temperature regulation system to malfunction, leading to a chronic, low-grade fever.

Symptoms of Persistent Low-Grade Fever

In addition to the slightly elevated body temperature, other common symptoms of a persistent low-grade fever include:

• Fatigue
• Lack of appetite
• Chills
• Sore throat
• Cough
• Headache
• Muscle aches

When to Seek Medical Attention

In general, a low-grade fever is not a cause for immediate concern, especially if it is accompanied by other mild symptoms. However, you should see a doctor if:

• The fever lasts for more than three days in adults or continues for more than three days in children
• The fever is accompanied by severe symptoms like a rapidly worsening rash, confusion, persistent vomiting, seizures, or difficulty breathing
• The fever occurs in infants under 3 months old, as it can be a sign of a serious infection

Treating Persistent Low-Grade Fever

The treatment for a persistent low-grade fever will depend on the underlying cause. In many cases, the fever is a natural response to an infection, and the best approach is to manage the symptoms and allow the body to fight off the infection. This may involve:

• Resting and staying hydrated
• Taking over-the-counter pain relievers like acetaminophen or ibuprofen to reduce the fever and alleviate other symptoms
• Treating the underlying infection with antibiotics or antiviral medications, if prescribed by a doctor

If the persistent low-grade fever is caused by an underlying health condition, the treatment will focus on addressing that condition, which may involve medications, lifestyle changes, or other interventions.

Preventing Persistent Low-Grade Fever

While it’s not always possible to prevent a persistent low-grade fever, there are some steps you can take to reduce your risk:

• Maintain a healthy immune system by getting enough sleep, eating a nutritious diet, and exercising regularly
• Practice good hygiene, such as washing your hands frequently, to reduce your exposure to infectious agents
• Manage stress levels, as high stress can weaken the immune system and make you more susceptible to infections
• Avoid or limit the use of medications that can potentially cause a fever as a side effect

If you are experiencing a persistent low-grade fever, it’s important to pay attention to any accompanying symptoms and seek medical attention if the fever lasts longer than a few days or is accompanied by severe or concerning symptoms. By working with your healthcare provider, you can identify the underlying cause and receive the appropriate treatment to help you feel better.