At present, due to a variety of factors facial dermatitis patients more and more, especially female patients often appear facial redness, dryness and flaking, recurring episodes, become sensitive skin. 1, the reason: 1, environmental seasonal factors: spring and autumn there are pollen, trees and other factors allergies triggered; winter due to dry air, haze factors lead to serious dehydration of the skin and thus the skin protection function decline, coupled with excessive washing, skin loss of protective film, causing the cheeks to appear red and flaky. 2, facial skin care products factor: few people in life can leave skin care products, less than a few, more than a few dozen, each skin care products contain more than 10-20 kinds of chemical substances, long-term application triggered by impaired skin barrier function, thinning of the stratum corneum, once you stop using or switch to other skin care products are prone to facial redness, flaking. Some people with facial problems apply some hormone creams for a long time on their own, the face is normal when using the medicine, but once discontinued there is a serious rebound, the facial skin becomes red, capillary expansion, forming hormone dependent dermatitis. 3, occupational and environmental factors: long-term exposure to some chemical substances and their work environment or long-term outdoor work, facial skin is also prone to also become sensitive. Differential diagnosis: 1. Eczema: often erythema, papules, accompanied by exudation and scabs in severe cases, can involve multiple parts; 2. Rosacea: manifested as facial paroxysmal flushing, burning sensation, symmetrical distribution, accompanied by burning, itching, dryness and other certain 1-2 symptoms; 3. Seborrheic dermatitis: manifested as persistent erythema distributed along the midline around the nose, the central arch of the eyebrows, the jaw, etc., flaking, with mild itching or None. Cautions: 1. Once the facial redness and dryness appear, it is recommended to consult a hospital for a clear diagnosis, listen to the advice of a professional doctor, and stop using all the original skin care products; 2. You can apply some medical skin care products with restorative effect.