Skin cancer is a collective term for malignant tumors occurring in exposed parts of the body, and the common ones are carcinoma in situ (i.e. intraepidermal tumor), squamous cell carcinoma, basal cell carcinoma and so on. Experts said that skin cancer is an easily curable malignant tumor, the key is whether it can be detected and treated early. The key is whether it can be detected and treated early. The earlier the skin cancer is treated, the better the effect will be. In the early stage of skin cancer, the symptoms are not obvious and often painless, so patients often neglect it or deal with it at home because they are too troublesome and afraid of spending money. If squamous cell carcinoma, which grows faster, is more malignant and prone to metastasis, is encountered, huge ulcers may appear on the face, and it will be too late to seek medical treatment at this time. The earlier the treatment of skin cancer, the better, and it is better for patients to consult the doctor and treat it at an early stage. At present, in addition to surgical operation, the treatment methods include drug treatment, cryotherapy, radiation, chemical, laser and immunotherapy, etc., all of which have good curative effect and the cure rate can be over 90%. Skin is the same as human organs, delayed treatment and repeated attacks of skin diseases will also increase the possibility of cancer. Therefore, sudden increase in the number of moles on the skin, deepening of color, oozing, ulceration, hair loss, bleeding, or sudden appearance of lumps and hyperpigmentation, etc., may be the signs of skin cancer, and one should seek for medical treatment in time. Although white people have a higher chance of developing skin cancer, we should know enough about skin cancer and what are the measures to prevent skin cancer, so that we can reduce the rate of skin cancer through effective prevention in our daily life.