Photo-aging of the skin is a change in the state of the skin, resulting from the negative effects of sunlight. In the medical literature, in addition to the term "photoaging", there are often terms "actinic dermatosis" "premature skin aging" and "heliodermatitis". Photoaging is divided into aging, which is caused by the influence of ultraviolet radiation and aging caused by hormonal changes in the body, which is due to age-related changes during the menopause, according to the Internet edition for girls and women aged 14 to 35 Pannochka. Net Sometimes photoaging is confused with age-related skin aging. In fact, these processes differ in clinical manifestations and have different histological and biochemical features. As a rule, photoaging occurs simultaneously with age-related aging, so the signs of two types of aging can be seen simultaneously.

The greatest influence of photoaging has on those people who constantly expose their skin to sunburn. In summer, they sunbathe in the peak of solar activity, and in winter they regularly go to the solarium. For the body a small tan can be useful, but excessive irradiation of the skin with ultraviolet causes pathological changes in the epidermis. The process of dividing the maternal cells of the epidermis (keratinocytes) is repeatedly amplified, as a result of which the skin thickens unevenly and corneads. Changes occur in the subcutaneous layer, not only on the surface of the skin. Elastin fibers are destroyed, an inflammatory process occurs in their place, which prevents normal capillary blood flow), t. There is a solar elastosis.

When photoaging, signs of healthy skin disappear: elasticity, uniform texture and pigmentation, the necessary amount of moisture, no defects (wrinkles or scars), resistance to unfavorable factors.

Photoaging is chronic and acute.

Acute aging is caused by burns and manifests in the form of local foci, and chronic is provoked by regular ultraviolet irradiation. It manifests itself in the form of poor elasticity, vascular changes, texture disorders and skin pigmentation, the appearance of neoplasms.

By the term "skin damaged by the sun" physicians mean a number of clinical manifestations: freckles, chloasma, melasma, sun lentigo, poikiloderma Sivatta, vitiligo, chronic idiopathic teardrop hypomelanosis.

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