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Tinea Nigra: Symptoms, Causes, and Prevention

Tinea nigra is a rare, non-contagious fungal infection of the skin that affects the palms of the hands and the soles of the feet. The infection appears as a dark, brownish-black patch on the skin, which may be mistaken for a mole or a freckle. While it is usually harmless, it can be unsightly and cause embarrassment.

The fungus that causes tinea nigra is called Hortaea werneckii. It is commonly found in soil, decaying wood, and other organic matter in tropical and subtropical regions. The fungus can enter the skin through small cuts or abrasions, and it thrives in warm, moist environments.

The symptoms of tinea nigra typically develop slowly over time. The infection may start as a small spot that gradually grows in size. The patch is usually painless, but it may be itchy or scaly. In some cases, the skin may become thickened or cracked.

1. Cause: The fungus that causes tinea nigra is called Hortaea werneckii. It is commonly found in soil, decaying wood, and other organic matter in tropical and subtropical regions. The fungus can enter the skin through small cuts or abrasions, and it thrives in warm, moist environments.
2. Symptoms: The symptoms of tinea nigra typically develop slowly over time. The infection may start as a small spot that gradually grows in size. The patch is usually painless, but it may be itchy or scaly. In some cases, the skin may become thickened or cracked.
3. Diagnosis: Tinea nigra is diagnosed by a dermatologist, who will examine the affected area and may take a sample of the skin for laboratory testing.
4. Prevention: To prevent tinea nigra, avoid walking barefoot in warm, moist environments, such as swimming pools, public showers, and locker rooms. Wear protective footwear, such as sandals or flip-flops, in these areas. Keep your skin clean and dry, and avoid sharing towels or personal items with others.

Tinea nigra is usually treated with antifungal medications, either applied topically or taken orally. However, it is important to consult a dermatologist for proper diagnosis and treatment. With proper care and prevention, tinea nigra can be avoided and managed effectively.