Tinea nigra: Diagnosis, treatment, and remedies

Tinea nigra is a very rare fungal infection. It causes brown or black patches to develop on the soles of the feet, the palms of the hand, or, on rare occasions, the torso.

A type of yeast called Hortaea werneckii causes most tinea nigra infections. A person can get the infection when the yeast gets into their body, often through a small wound.

Keep reading to learn more about a tinea nigra infection, including the symptoms, diagnosis, and treatment options.

Tinea nigra causes brown or black patches to appear on the soles of the feet or the palms of the hand. The patches may be so small and faint that a person does not notice them. They also tend to grow slowly. The most common symptoms include:

• a patch on the foot or hand following an injury
• a single round, linear, or irregularly shaped patch that grows slowly
• growing patches that either cause no symptoms or itch
• patches that resemble a growing mole or freckle
• a slow growing brown patch on the torso

The infection affects people who live in tropical regions and those who have recently traveled to these areas.

Most people with tinea nigra have just one lesion. However, if the fungus comes into contact with multiple points of entry, such as wounds on both hands, a person may have several patches.

In healthy people, tinea nigra lives only on the superficial layers of the skin. It does not spread, cause serious infections, or present major health risks. It is more likely to affect young people under the age of 20 years.

Tinea nigra is a fungal infection, which means that a person gets it when they come into contact with a fungus that can cause the infection.

Scientists used to call Hortaea werneckii either Cladosporium werneckii, Exophiala werneckii, or Phaeoannellomyces werneckii. Another yeast called Stenella araguata may cause some cases of tinea nigra.

As with many other fungi, Hortaea werneckii thrives in moist or humid environments. It lives on dead and decaying organic material, such as soil and wood. It can get into the human body when it comes into contact with the skin, usually through a wound. It is most likely to live on parts of the body with many sweat glands, such as the hands and feet.

Certain risk factors increase a person’s likelihood of developing this infection. They include:

• living in a tropical or subtropical region
• recent travel to a subtropical or tropical region
• a history of hyperhidrosis, a condition that causes excessive sweating
• a recent injury
• contact with wood, soil, or compost, such as from gardening without gloves or woodworking in a tropical or subtropical region

In many cases, a person’s symptoms may lead a doctor to suspect tinea nigra. However, as tinea nigra can resemble the symptoms of several other conditions, it is important to get an accurate diagnosis.

The doctor may ask the individual about their recent travel, injury history, and exposure to wood, compost, or soil. They will also usually take a culture of the skin and send it to a lab to see whether Hortaea werneckii grows within a week. If it does, this means that the test is positive for tinea nigra.

Sometimes, a doctor may also perform a skin biopsy to test for skin cancer, as certain types of skin cancer can look similar to tinea nigra.

People who wish to try home remedies may see improvements with keratolytic agents. A keratolytic is a chemical that helps remove excess skin. Some potentially effective keratolytics include:

• wart cream
• salicylic acid
• Whitfield’s ointment

These drugs may not be safe during pregnancy, so women who are pregnant or trying to become pregnant should see a doctor instead of trying home remedies.

If home treatment fails, it is best to see a doctor. There are other possible causes of brown lesions on the skin.

Doctors usually prescribe topical antifungal creams to treat tinea nigra. People should apply the cream directly to the patch exactly as a doctor advises.

In some cases, a person may also need to take oral antifungal drugs, especially if the lesions are very large or if antifungal creams have not worked. However, oral drugs may not be effective.

Doctors do not know what treatment duration is optimal, but the authors of one report suggest that 1 month of treatment is sufficient.

People can reduce the risk of tinea nigra infections by protecting the skin from exposure to soil, compost, and other materials in which the Hortaea werneckii fungus likes to grow. Following this advice is especially important for people who travel to or live in tropical regions.

These strategies can help:

• practicing frequent handwashing, especially after spending time outside
• wearing gloves or other protective gear in the garden
• refraining from walking outside with bare feet
• wearing socks or shoes in public places
• changing socks frequently, especially if they get wet
• covering any wounds on the hands or feet before spending time outside

Several other skin conditions may look similar to tinea nigra. Other fungal infections, such as athlete’s foot, may also cause skin lesions, but they are not usually brown.

Melanoma, a type of skin cancer, can be deadly. It may also look very similar to tinea nigra in the early stages. Similarly to tinea nigra, melanoma is not typically painful at first. Therefore, people who do not get relief from home or medical treatment should see a dermatologist and request a biopsy.

Some other medical conditions and factors that may cause brown patches include:

• skin staining from henna
• skin hyperpigmentation from pregnancy or Addison’s disease
• complications of syphilis
• exposure to certain chemicals, such as silver nitrate

Tinea nigra is not a serious medical condition. Most people do not notice any symptoms other than brown spots on the skin.

However, as tinea nigra looks similar to several other conditions, it is important to see a doctor for an accurate diagnosis.

Prompt treatment can prevent serious skin-related conditions from getting worse.

Tinea nigra: Diagnosis, treatment, and remedies

Tinea nigra is a very rare fungal infection. It causes brown or black patches to develop on the soles of the feet, the palms of the hand, or, on rare occasions, the torso.

A type of yeast called Hortaea werneckii causes most tinea nigra infections. A person can get the infection when the yeast gets into their body, often through a small wound.

Keep reading to learn more about a tinea nigra infection, including the symptoms, diagnosis, and treatment options.

Tinea nigra causes brown or black patches to appear on the soles of the feet or the palms of the hand. The patches may be so small and faint that a person does not notice them. They also tend to grow slowly. The most common symptoms include:

• a patch on the foot or hand following an injury
• a single round, linear, or irregularly shaped patch that grows slowly
• growing patches that either cause no symptoms or itch
• patches that resemble a growing mole or freckle
• a slow growing brown patch on the torso

The infection affects people who live in tropical regions and those who have recently traveled to these areas.

Most people with tinea nigra have just one lesion. However, if the fungus comes into contact with multiple points of entry, such as wounds on both hands, a person may have several patches.

In healthy people, tinea nigra lives only on the superficial layers of the skin. It does not spread, cause serious infections, or present major health risks. It is more likely to affect young people under the age of 20 years.

Tinea nigra is a fungal infection, which means that a person gets it when they come into contact with a fungus that can cause the infection.

Scientists used to call Hortaea werneckii either Cladosporium werneckii, Exophiala werneckii, or Phaeoannellomyces werneckii. Another yeast called Stenella araguata may cause some cases of tinea nigra.

As with many other fungi, Hortaea werneckii thrives in moist or humid environments. It lives on dead and decaying organic material, such as soil and wood. It can get into the human body when it comes into contact with the skin, usually through a wound. It is most likely to live on parts of the body with many sweat glands, such as the hands and feet.

Certain risk factors increase a person’s likelihood of developing this infection. They include:

• living in a tropical or subtropical region
• recent travel to a subtropical or tropical region
• a history of hyperhidrosis, a condition that causes excessive sweating
• a recent injury
• contact with wood, soil, or compost, such as from gardening without gloves or woodworking in a tropical or subtropical region

In many cases, a person’s symptoms may lead a doctor to suspect tinea nigra. However, as tinea nigra can resemble the symptoms of several other conditions, it is important to get an accurate diagnosis.

The doctor may ask the individual about their recent travel, injury history, and exposure to wood, compost, or soil. They will also usually take a culture of the skin and send it to a lab to see whether Hortaea werneckii grows within a week. If it does, this means that the test is positive for tinea nigra.

Sometimes, a doctor may also perform a skin biopsy to test for skin cancer, as certain types of skin cancer can look similar to tinea nigra.

People who wish to try home remedies may see improvements with keratolytic agents. A keratolytic is a chemical that helps remove excess skin. Some potentially effective keratolytics include:

• wart cream
• salicylic acid
• Whitfield’s ointment

These drugs may not be safe during pregnancy, so women who are pregnant or trying to become pregnant should see a doctor instead of trying home remedies.

If home treatment fails, it is best to see a doctor. There are other possible causes of brown lesions on the skin.

Doctors usually prescribe topical antifungal creams to treat tinea nigra. People should apply the cream directly to the patch exactly as a doctor advises.

In some cases, a person may also need to take oral antifungal drugs, especially if the lesions are very large or if antifungal creams have not worked. However, oral drugs may not be effective.

Doctors do not know what treatment duration is optimal, but the authors of one report suggest that 1 month of treatment is sufficient.

People can reduce the risk of tinea nigra infections by protecting the skin from exposure to soil, compost, and other materials in which the Hortaea werneckii fungus likes to grow. Following this advice is especially important for people who travel to or live in tropical regions.

These strategies can help:

• practicing frequent handwashing, especially after spending time outside
• wearing gloves or other protective gear in the garden
• refraining from walking outside with bare feet
• wearing socks or shoes in public places
• changing socks frequently, especially if they get wet
• covering any wounds on the hands or feet before spending time outside

Several other skin conditions may look similar to tinea nigra. Other fungal infections, such as athlete’s foot, may also cause skin lesions, but they are not usually brown.

Melanoma, a type of skin cancer, can be deadly. It may also look very similar to tinea nigra in the early stages. Similarly to tinea nigra, melanoma is not typically painful at first. Therefore, people who do not get relief from home or medical treatment should see a dermatologist and request a biopsy.

Some other medical conditions and factors that may cause brown patches include:

• skin staining from henna
• skin hyperpigmentation from pregnancy or Addison’s disease
• complications of syphilis
• exposure to certain chemicals, such as silver nitrate

Tinea nigra is not a serious medical condition. Most people do not notice any symptoms other than brown spots on the skin.

However, as tinea nigra looks similar to several other conditions, it is important to see a doctor for an accurate diagnosis.

Prompt treatment can prevent serious skin-related conditions from getting worse.

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Dear patients!
Multidisciplinary Clinic and Maternity Hospital “Paracelsus” informs you, according to the Letter of the Ministry of Finance of the Russian Federation to the Federal Tax Service dated March 25, 2022. N BS-4-11 / 3605, that subparagraph 3 of paragraph 1 of Article 219 of the Tax Code of the Russian Federation provides for the taxpayer’s right to receive a social tax deduction in the amount paid by him in the tax period for medical services provided by medical organizations engaged in medical activities , him, his spouse, parents, children (including adopted children) under the age of 18, wards under the age of 18 (in accordance with the list of medical services approved by the Government of the Russian Federation).

Joint order of the Ministry of Taxation of Russia and the Ministry of Health of Russia of July 25, 2001 N 289 / BG-3-04 / 256 (hereinafter – the order of July 25, 2001) approved the form of the Certificate of payment for medical services for submission to the tax authorities of the Russian Federation (hereinafter – the Certificate payment for medical services).

This certificate certifies the fact of receiving a medical service and its payment through the cash desk of a healthcare institution at the expense of the taxpayer.

Thus, if the taxpayer submits to the tax authority a Certificate of payment for medical services, the taxpayer’s failure to submit the relevant contract for the provision of medical services and (or) documents confirming payment cannot be grounds for refusing to provide such a deduction.

The amounts are based on payment data. Therefore, checks, an agreement and a clinic license are not needed to make a deduction.

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Deputy Director for Medical Activities of the Multidisciplinary Clinic “Paracelsus”

Makeev Alexander Anatolyevich

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Plantar Wart (Spike): Causes and Treatments

June 21, 2018

Plantar Warts is a type of wart that occurs on the soles of the feet and on the palms of the hands.
Of all skin warts, plantar warts occur in 30%. They are the ones most often removed.

The only cause is the human papillomavirus, HPV for short.

Scheme of infection: people scratched the skin. The virus enters the skin. Embedded in the genes of skin cells. The cell takes on ugly forms, becoming similar to tumor cells.

Caution: Some types of human papillomavirus can cause cervical dysplasia and cancer.
Infection with the type of HPV that causes warts occurs during childhood. Almost all children become infected with this virus – in kindergartens, at schools, in public places. But not everyone gets sick – it all depends on the immune system. In childhood, warts appear for the first time. Then the adult’s immune system copes with this virus. Therefore, in adults, warts on the skin rarely appear. And if an adult has spikes, this indicates a decrease in the activity of the immune system.
Entrance gates for the virus are injuries of the soles of the feet and palms: scratches, cuts, abrasions and calluses. Provoking factors – excessive sweating of the feet and wearing tight shoes, stress.

The main manifestation of is a hard, round mass on the palm or sole of the foot.

Main symptom : Pain when walking and itching around the wart.

Initial stage:

• a small callus appears,
• she itches,
• hurts when walking.

After 2-4 weeks:

• Rough surface appears in the center,
• often – black dots in the center, **
• along the edges – a small roller of keratinized skin.

Why?

• Why do spines appear on the palm and sole? Because the skin here is especially dense (unlike other parts of the body). And this type of HPV virus infects just such skin.
• Why does it hurt when walking? Because the spine grows inward. When walking, the weight of the body presses on the wart and it compresses the pain receptors.
• Why is itching? Because the ugly cells of the plantar wart on the foot and palm press on neighboring skin receptors, which leads to itching.
• Why black dots? This is the result of blockage of blood vessels in the thickness of the wart on the foot or on the palm.

Dimensions – 3 -10 mm. At the same time, they rise above the surface of the skin by only 1-2 mm, because they grow inward and in breadth.
Child warts may appear nearby. They merge with the mother and form a painful conglomerate. This is a clear indicator of a decrease in immunity. And this often requires medical treatment.

Methods of treatment:

In 90% of people, a plantar wart goes away without treatment at an early stage. The immune system suppresses the virus and heals the skin.
The time of self-healing depends on the stage of the process: from 2 weeks to 1.5 years.

When should a thorn be treated?

• if it hurts a lot,
• if it interferes with walking,
• if grown to a large size,
• if children appear nearby.

How and with what to treat warts on the feet?

Removal – a treatment that is successful in 98% of patients

Drug removal

Local necrotizing agents are used for this purpose.
Solcoderm, vartoks, duofilm, kollomak, super celandine and others
They contain acids or alkalis. Removal of plantar warts (thorns) occurs through a chemical burn of the skin. The wart is dying.
And in this place there is an inconspicuous scar.
The treatment time is long: an average of 14-20 days).
The probability of recurrence (reappearance at the same place) is very high.

Instrument removal

• Laser.

Your wart will be vaporized by the laser. In this place you will have a deep wound. The wound will heal in 10-14 days.
Disadvantages of the method: deep wound after removal. Rough scarring.

• Liquid nitrogen.

Deep tissue freezing occurs. A bubble forms. It will hurt a lot and then hurt more!! Heals 14 days.
Disadvantages of the method: Severe pain during removal and after removal. Prolonged healing. Rough scar.

• Radio wave radiation (device “Surgitron”).

The same effect as from the laser – tissue evaporation. And only a deepening-wound will remain from the wart.

Advantages of the method:

Nearby vessels are coagulated, forming a dense crust at the site of the neoplasm, so the removal is performed without damage to the vessels and does not cause even the slightest blood loss.
The crust disappears on its own after 7-10 days. In its place is an inconspicuous scar.

The wart is burned out with an electrocoagulator. This is the same scalpel, only electric. It is now rarely used in large clinics.

Prevention is the foundation of the foundations

• Wearing loose shoes.
• Treatment of excessive sweating of the feet.