A piece of skin becomes black and hairy, which can be seen in nevus, melanoma and other diseases.
1. Pigmented nevus: it is a benign proliferation of melanocytes, the nevus cells are mostly located in the subepidermis or dermis, often higher than the surface of the skin, the surface is smooth, and there can be sweat hairs through (called nevus of hairs), and malignant transformation is rare, generally it will not affect health, but if it affects the aesthetics, it will be removed by freezing treatment or laser treatment.
2. Melanoma: it is caused by excessive proliferation or malignant proliferation of melanocytes, which may be related to genetic factors, excessive exposure to ultraviolet rays, etc. It can lead to blackening of the skin and growth of hairs, and can also cause itching and bleeding, etc. Once diagnosed, surgery should be performed promptly.
Once the diagnosis is confirmed, surgical resection should be carried out in a timely manner, which can adopt intraoperative lymph node localization or regional selective lymph node dissection, and patients with metastasis can adopt chemotherapy or combined chemotherapy.
If a piece of skin becomes black and hairy, and if rapid changes occur within a short period of time, it is necessary to go to the dermatology department of the hospital in a timely manner to find out the cause and follow the doctor’s instructions to standardize the treatment.