Itchy skin turns black, may be solar dermatitis, eczema, ringworm and other skin diseases caused by.
1. solar dermatitis: if the local skin is exposed to the sun for a long time, it will lead to the release of inflammatory mediators from the local epidermis, which will stimulate vasodilatation and cause inflammatory infiltration, leading to local symptoms of itchy skin, and may also appear pigmentation, making the local skin black.
2. Eczema: If the local skin contact with dog hair, pollen, dust and other substances, this will make the local vascular permeability enhancement, thus triggering eczema symptoms. When the local inflammatory reaction stimulates the local melanocytes, it will trigger pigmentation, which will lead to the symptoms of itchy black skin.
3. ringworm: when the patient’s local skin contact with red ringworm, trichophyton and other dermatophytes, these dermatophytes will penetrate the stratum corneum cells, and local secretion of inflammatory mediators, which will make the patient itchy skin, blackened situation.
If diagnosed with the above diseases, early and standardized treatment is recommended to reduce the adverse effects of the disease.