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symptoms, early symptoms and signs of ringworm nigra

symptoms, early symptoms and signs of ringworm nigra

Symptoms of tinea nigricans

Early symptom: palm black tinea is the macula of subjective symptom, neither high, have no scale, its boundary is clear, often be single

Late symptoms: After that, it gradually expands around and becomes dark and black.

Related symptoms: skin atrophy and pigmentation, epidermal keratosis, scattered moles on the whole body skin

I. Symptoms

It is more common in young people and can also be seen in old age. Women are prone to hair, and the ratio of male to female is 1: 3. The initial damage is black or brown spot, which is similar to pigmentation left by silver nitrate or ink coated on the skin. The surface is not high, generally without scales, sometimes with scales or mild keratinization, obvious boundary and lack of conscious symptoms. Mycosporum tensonii is common in neck and chest lesions, while Mycosporum vernichii is common in palm lesions. It is easy to occur in the palm of your hand, but also in the soles of your feet, neck and trunk.

Second, diagnosis

The initial damage is black or brown spot, which is similar to pigmentation left by silver nitrate or ink coated on the skin. The surface is not high, generally without scales, sometimes with scales or mild keratinization, obvious boundary and lack of conscious symptoms. Mycosporum tensonii is common in neck and chest lesions, while Mycosporum vernichii is common in palm lesions. Fungal culture: On glucose-peptone agar, at room temperature, Mycosporidium tensoni grew rapidly, and the colony was hemispherical bulge after 2 ~ 4 days, with black villous hyphae on the surface, neat edges and black back. Biopsy shows that there are light brown segregated hyphae in the stratum corneum of skin, which are short, curved or straight, and sometimes have spores at the end of hyphae.

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