The use of azelaic acid
Azelaic acid, although it was not called this in ancient times, it is widely used. For skin diseases, there are many benefits.

Past healers, to detect skin sores, acne symptoms, or use herbal mixtures, which may contain azelaic-like effects. It can calm the heat of the skin and eliminate the appearance of redness and swelling. In acne overgrown, it can clear the depression of the skin, make the pores smooth, and restore the skin to its radiance.

And in the condition of uneven skin tone, it also has the function of adjusting the sub. It can even out the color of the skin, restore light to the dark ones, and turn shiny to the dark ones, just like the melting snow in spring, and gradually take on a clear appearance.

It can also help the skin resist the invasion of external evils, strengthen the skin's barrier, make the skin safe and free from the disturbance of wind evil and heat poison. Although the name of azelaic acid is not directly written in ancient books, its methods of use are scattered in all directions, benefiting everyone's skin health.