1 It may be caused by too much water shortage and dry skin.
Because it is allergic to some molecules in the air, such as pollen or dust.
3 because the skin's own skin resistance is relatively poor, which may be caused by improper use of cosmetics.
Because of the change of seasons.
Based on the above reasons, I recommend several solutions!
1 No matter what season, don't let the skin be dehydrated. Replenishing water depends on your skin.
In addition to some skin care products supplemented with pure water, dry skin should also use some cream products to lock in moisture.
3 oily skin should use emulsion products, because emulsion products will be better absorbed.
If it is sensitive skin, the skin must not be short of water, and then use some cream products to increase the skin's resistance.