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According to statistics, for the years 2015&ndash;2017, half of all appeals to dermatologists are related to skin color disorders. Approximately 94% of patients in the 40-60 age group voiced the main complaint - the appearance of pigment spots on the skin (seasonal pigmentation of the skin of the face, shoulders, d&eacute;collet&eacute;). Let&#39;s take a detailed look at the causes of skin photodamage and methods of their prevention.

What processes are triggered in the human body by excessive and irrational sunbathing?

<h2>Ultraviolet radiation (UV)</h2>

In medicine, the rays of the ultraviolet spectrum are divided into three types: UVA, UVB, UVC, the wavelength of which lies in the range from 200 to 400 nm.

The wavelength of 290 nm is the most biologically active, causing a number of harmful changes in living structures. Waves shorter than 290 nm are absorbed by the Earth&#39;s ozone layer.

Waves from 200-290 nm belong to the bactericidal spectrum: they destroy the DNA structure and are harmful to epidermal cells. Such waves are often used in artificial radiation sources, therefore, when quartzing the room, it is recommended to leave it for the duration of the procedure.

Waves with a length of 290-320 nm are classified as UVB, belong to the &quot;tanning&quot; spectrum and are the most biologically active (for example, waves with a length of 297 nm are hundreds of times faster to cause an erythematous reaction of the skin than waves of 313 nm).

Full version of the access article <a href="https://pro.bhub.com.ua/cosmetology/fotostarinnya-klinika-patogenez-profilaktika">in Ukrainian</a>

Photoaging: clinic, pathogenesis, prevention