Azelaic acid and sun exposure theory
Azelaic acid is widely used in the skin. However, its association with sun exposure cannot be ignored.

Solar rays, containing ultraviolet rays, are often exposed to the sun, and the skin is vulnerable to its damage. Azelaic acid has antioxidant properties and can protect the skin from free radicals. This is especially effective in the sun environment. Sunlight irradiates the skin, promoting free radicals, causing skin cell damage and aging, while azelaic acid can block this process and protect the safety of cells.

When azelaic acid is used, it should also be heavily protected against the sun. Although it has the effect of skin care, it is not a substitute for conventional sun protection. The power to cover the sun is strong, and the protection of azelaic acid is limited. When going out, it is advisable to wear clothing that covers the body, support an umbrella for shading, and use high-quality sunscreen products to apply on time to keep the skin intact.

Also, after some people use azelaic acid, the skin may be sensitive, especially under the sun. Therefore, for beginners, it is advisable to try it on a small scale to observe the skin's reaction. If there is any discomfort, when using it slowly or discontinuing it, consult a doctor to get a correct solution.

In short, azelaic acid is beneficial to the skin. At the same time, it must be heavily protected from the sun, so as to keep the skin healthy, avoid the damage of sunlight, and enjoy the benefits of azelaic acid skin care.