Skin cancer is a disease that worries us a lot. We try to avoid it because once it happens, the impact on our lives is really too much. But do you know that repeated infection of cysts can lead to skin cancer? What are the causes of skin cancer? Let's take a closer look! Common causes of disease include: ① Daily exposure and ultraviolet radiation: There is sufficient evidence to support ultraviolet radiation. The interaction between the human body's melanin protection and the immune system function leads to the occurrence of skin cancer. When measuring human skin in sunlight, the parts of the skin that receive the largest amount of ultraviolet rays are the head, face, back of the neck, and hands. Squamous cell carcinoma almost all occurs in these parts. The carcinogenic mechanism of ultraviolet rays may be that the photochemical effect changes the structure of cell DNA, while destroying the active antigen structure on the surface of lymphocytes, reducing the body's immune function, and leading to the occurrence of skin cancer with the joint participation of other cancer-promoting factors. ② Chemical carcinogens: About 100 years after Percivall first described the report of chimney sweeps being prone to scrotal skin cancer, people discovered that workers frequently exposed to arsenides, tar and asphalt are prone to skin cancer. Chemical carcinogens can be divided into two periods, the initial period and the promotion period. The results induced by the initial period are closely related to the limit of exposure to special substances or carcinogens, and their progression is irreversible. Cell changes are related to genetics. The promotion period requires repeated exposure to the contact material and is related to the interval time. If there is no exposure for a long time, it can still be reversed and no cancer will occur. The interval time between the initial period and the promotion period is very important. There can be two results, the formation or non-formation of skin cancer. ③ Ionizing radiation: In the past, skin cancer occurred on the basis of radiation dry skin disease caused by radiation workers' neglect of protective measures. In recent years, due to the improvement of radiation equipment and the advancement of radiation technology, especially the strengthening of various protective measures, occupational skin cancer has basically disappeared. However, cases of skin cancer in the radiation field can still be seen in some patients receiving radiotherapy after several years. ④ Chronic irritation and inflammation: Malignant skin tumors can occur and develop in scars, chronic ulcers, fistulas, and sinus tracts. Some Asian people are addicted to chewing tobacco or betel nuts, so squamous cell carcinoma is prone to occur in the mouth or lips. ⑤Others: During the immunosuppression stage, the patient's immune system is underactive and skin cancer may occur. For example, the use of immunosuppressants can promote the occurrence of skin cancer. Viral carcinogens. Many viruses can cause cancer in animal hosts. Many subtypes of human papillomaviruses in humans can induce skin cancer. The above is an introduction to the causes of skin cancer. We would like to remind friends that if you want to stay away from this disease, you must take preventive measures so that you can live a healthy and happy life. |