Facial contact dermatitis is always bad, mostly considered to be skin care products, seasonal factors. 1. Skin care products: this symptom is not excluded from the long-term use of skin care products or poor quality masks, because these skin care products will lead to damage to the skin barrier function, the stratum corneum gradually thinning. Once you stop using such skin care products or replace other brands of skin care products, it is easy to appear facial redness and swelling as well as flaking phenomenon. 2. Seasonal factors: Especially in spring and fall, pollen and trees and other factors may cause allergic reactions. The cold winter, because the air is too dry, haze, will also induce severe dehydration of the skin, and reduce the skin repair function, when the skin loses its protective mode, will also induce flaking, redness, swelling and itching and other symptoms. If the patient’s facial contact dermatitis is always bad, you should stop using skin care products, and go to the hospital in time to find out the problem as soon as possible as soon as possible, so as not to delay the condition.