How to choose sunscreen products and how to use them to achieve the best results

We are exposed to ultraviolet rays every day in our daily lives. If we don’t take good care of our skin, it will cause skin damage. So how do we choose sunscreen products? How can we use sunscreen to achieve the best effect?

First of all, the ingredients of sunscreen are the factors we need to focus on. Sunscreen can be divided into two categories according to the ingredients. The first category is physical sunscreen. Physical sunscreen generally contains titanium dioxide or zinc oxide, which can directly reflect ultraviolet rays and have low allergenicity, but it is easy to turn white. The second category is chemical sunscreen. Chemical sunscreens need to be absorbed by the human body to effectively reduce the damage of ultraviolet rays, but the skin feel is very good and there is no extra greasy feeling. In addition to being differentiated by texture, sunscreen can also be differentiated by sun protection index. Generally speaking, spf50&pa++++ sunscreen is a high-multiple sunscreen with high durability and good sun protection effect.

Generally, a 50-cent coin-sized amount is applied to the face, and a one-yuan coin-sized amount is applied to exposed parts of the body. Applying more will add burden to the skin, while applying less will affect the sunscreen effect. Before using sunscreen products, it is recommended to apply a small amount on the inside of the wrist for skin allergy test. Those who experience skin redness, swelling, pain and itching within ten minutes are prohibited from using sunscreen products. For people with sensitive skin, it is recommended to choose physical sunscreen products.

It is very necessary to reapply sunscreen every once in a while. However, it is not necessary to reapply in all situations. Whether to reapply should be flexibly controlled according to the work and living environment, the region, season, and climate conditions. If it is cloudy, in winter in low-latitude areas, the ultraviolet rays are relatively weak; or if the living and working environment is mainly indoors and rarely exposed to sunlight, as long as the sunscreen product is applied in the morning and the sunscreen film is not rubbed violently, there is basically no need to reapply, and the sun protection ability can already meet the needs of daily life.

Sunscreen is usually applied before primer and after lotion and cream. It is used as the last step of skin care. The main function of sunscreen is to prevent ultraviolet rays from sunburning the skin and melanin deposition, which plays a role in skin care. Sunscreen is generally best applied about 30 minutes before going out, and reapplied every 2-3 hours after going out. After applying sunscreen on the face and limbs, it will not take effect immediately. It takes about half an hour to form a protective film on the human body, so that it can block ultraviolet rays after going out.