A set of data once showed that in the 1930s, the incidence rate of skin cancer among U.S. Navy soldiers was 7 times higher than that of ordinary people after they were exposed to the sun due to military training.

Doctors from the oncology department of the Spanish hospital and the oncology department of the University of Valencia general hospital claim that 95% of melanoma lesions are caused by a large amount of exposure to ultraviolet light. He also said that the number of skin cancer cases has been increasing in the past 30 years, and has doubled in the past decade.

Skin cancer is related to the duration of exposure to the sun and the intensity of ultraviolet rays. The most direct culprit of skin cancer caused by sun exposure is ultraviolet radiation. 50%~70% of skin cancer is caused by excessive ultraviolet radiation. The longer you stay in the sun, the more dangerous it will be. The skin will gradually show symptoms such as redness, edema, skin inflammation and pain.

Sunburn symptoms and signs occur within 1~24 hours. Skin changes range from mild erythema with temporary scale formation to pain, edema, skin tenderness and bullae, involving lower limbs, especially anterior tibia. It is particularly annoying and often difficult to heal. If there is a large area of sunburn on the body surface, there are systemic symptoms similar to thermal burns (fever, chills, weakness, shock).

Once the skin is sunburned, it needs to be repaired in time. It can be treated by cold compress through a simple physical cooling method, such as using a cold towel or cold watermelon skin, wax gourd skin, etc. on the damaged skin, which can achieve the effect of detumescence and dampness. Patients with severe sunburn should also go to a regular hospital in time. Do not smear any nourishing oil or ointment containing oil and vaseline, otherwise local skin necrosis may occur