Cause of skin cancer

Common causes are: ① the daily exposure and ultraviolet radiation: There is sufficient evidence to support the ultraviolet radiation protection of human melanin interaction with the immune system has led to skin cancer occurred in daylight in the determination of human skin to ultraviolet skin, the largest part of Face the head neck squamous cell carcinoma of the hand occurred in these areas almost all of the carcinogenic mechanism of UV is a photochemical process may change the structure of the cell DNA at the same time destroyed the activity of lymphocyte surface antigen structure reduces the body's immune function In other cancer-promoting factors, the common participation of the incidence of skin cancer ② chemical carcinogens: Since Percivall workers first described a good chimney sweep hair scrotum skin cancer, about one year after a report found frequent contact with the tar and asphalt arsenide Workers are prone to skin cancer, cancer-causing chemicals can be divided into two, he began a long period with the beginning period to help the cause results and exposure to specific substances or carcinogens are closely related to the limits of carrying out their irreversible cellular changes and genetic factors to help long-term needs repeated exposure to contact with the interval of time-related things for a long time, if not exposed to reverse the non-occurrence of cancer can start a long period of time interval with the help sub-key, there may be two kinds of results that the formation or the formation of skin cancer, non-ionizing radiation ③ : In the past, the long-term workers from the radiological protection measures due to neglect of radiation caused by dry skin disease, based on the occurrence of skin cancer in recent years due to improvements in radiation equipment and radiation technology advances, especially the various protective measures strengthening occupational skin Cancer has basically disappeared but some patients receiving radiation therapy after a few years after the radiation wild skin cancer cases occurred can still be met ④ chronic stimulation and inflammation: malignant skin tumors can occur with the development of chronic ulcer formation in scar sinus fistula of the parts of some Asian populations in the habit of tobacco or betel nut chewing mouth or lips part and therefore prone to squamous cell carcinoma of the ⑤ Others: immune suppression phase of the immune system function in patients with skin cancer can occur, such as lower use immunosuppressive agents can contribute to the occurrence of virus-induced skin cancer carcinogen in the animal hosts of many viruses can cause cancer in humans in many of the subtypes of HPV-induced skin cancer can be