Chronic exposure to sunlight aging skin (dermatoglioz, external aging), which leads to the formation of wrinkles, coarsening skin, spotty hyperpigmentation and sometimes to telangiectasias. Atrophic reactions can occur in some people and resemble the reaction of the skin to X-ray therapy (chronic sun dermatitis).
Actinic keratosis is a precancerous lesion that often develops due to prolonged sun exposure. The most sensitive blonde and red-haired people with type I or II skin, black people are rarely prone to this disease. Keratose foci of pink color develop with fuzzy boundaries, the formation of scales of light gray or dark color. Actinic keratosis should not be confused with seborrheic keratosis, in which brown warts are formed, the number of which increases with age, which can also occur in areas of the skin that are not exposed to sunlight.
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The frequency of basal cell carcinoma formation in light-skinned people is directly proportional to the annual sun exposure. Such lesions usually occur in people who are often in the sun, for example in children and adolescents, athletes, farmers, sailors. Frequent exposure to the sun also increases the risk of malignant melanomas.