Sun exposure to skin The main effect of infrared rays on the body – thermal. They heat the surface of the skin, causing the expansion of capillaries, which leads to General redness of the skin. Ultraviolet rays have great biological activity. In moderate doses their action helpful. Increases the tone of the Central nervous system. Under their action, vitamin D is formed and metabolism is enhanced. Ultraviolet rays are harmful to microorganisms. First of all, children suffer from solar starvation, who have a risk of rickets. Therefore, it is necessary to take vitamin D and regulate sun exposure. Ultraviolet rays can also adversely affect the body: cause burns, the appearance of age spots and eye damage. Excessive ultraviolet radiation stimulates the degeneration of skin cells into malignant tumors.
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