1, pigmented dermatosis, characterized by decreased or increased pigment, generally painless, including vitiligo, melanosis, pigmented nevus, chloasma, freckles, etc.
2, vascular skin disease, manifested as bleeding spots, blood blisters, ulceration, nodules, such as allergic purpura, vasculitis and so on.
3, viral skin diseases. It can be manifested as growth on the skin, such as verruca vulgaris, verruca plantaris, verruca plana, etc. It can also be manifested as erythema and blisters, such as herpes zoster and chickenpox.
4, allergic diseases, the formation of various erythema, papules, erosion, exudation, accompanied by different degrees of itching, than eczema, erythema multiforme and so on.
5, erythema scale skin disease, manifested as white scales on erythema, may be accompanied by itching, such as psoriasis, erythroderma and so on.
6, bacterial diseases, manifested as local redness, swelling, heat, pain, such as folliculitis, staphylococcal scald syndrome.
7. Blister-like skin diseases are characterized by blisters and exfoliation of epidermis, such as pemphigus.
8. Seborrheic alopecia and alopecia areata. Characterized by alopecia.