The doctor named the mandatory rules for sun protection

It is necessary to apply creams with an SPF factor at an ultraviolet radiation index of three or higher. This indicator can be checked through special applications or websites with weather forecasts. Svetlana Petrova, a dermatologist at the Sberbank Health medical company, told Izvestia about this on April 12.

She explained that sunscreens should be applied 15 minutes before going outside to all exposed areas of the body: face, arms, neck and other areas not covered by clothing. In addition, when actively staying in the sun, especially on the beach, the cream needs to be renewed every 1.5–2 hours or after each swim. However, in urban environments, with periodic outdoor activities, re-application is usually not required.

Sunscreens with SPF, as explained by the doctor, protect the skin from the negative effects of solar radiation due to components that partially absorb and partially reflect ultraviolet rays, preventing them from reaching the skin cells.

"When choosing a sanskrit, you should take into account the level of protection, which is indicated by SPF and the numbers 15, 20, 30, 50. There is a rule: the higher the number, the more time you can safely stay in the sun, and the fewer rays will reach the surface of the skin. For walking around the city, for example, you should use a sanskrit with an SPF factor of at least 30, and for active sun exposure - say, on the beach — at least 50," said the dermatologist.

Petrova warned that ultraviolet radiation causes premature skin aging, increases the risk of age spots and neoplasms, including malignant ones. She also shared that according to research, regular use of sunscreens reduces the likelihood of developing skin cancer.

Even mild sunburn is particularly dangerous. The dermatologist clarified that UV damage has a cumulative effect, and each burn increases the risk of serious problems in the future.

The doctor also drew attention to phototoxic reactions, which can manifest as itching, swelling and redness of the skin. Such reactions, she says, occur when using certain medications that increase sensitivity to the sun.

"People who are at risk should pay special attention to UV protection. Among them are adults and children with fair skin, light eyes, and light or red hair, people with a large number of moles on their bodies, and those who already have some kind of skin disease," the specialist concluded.

Earlier, on April 9, Acting Dean of the Faculty of Natural Sciences of the State University of Education Irina Lyalina told Izvestia how to keep the skin young. She explained that step—by—step care will preserve the turgor - elasticity - of the skin and prevent it from becoming "thinner" with age. The expert recommended using mild products without aggressive surfactants for cleansing, and creams with hyaluronic acid and ceramides for moisturizing. Serums with vitamin C, E, and niacinamide are used as antioxidants.