Skin redness may be related to long-term in the plateau environment, the influence of drugs, improper skin care. 1. Long-term in the plateau environment: people living in the plateau environment for a long time, due to the high altitude, thin air, capillary compensatory expansion, or wind and sun climate factors lead to the facial skin cuticle is too thin, so that the subcutaneous capillaries are exposed to the outside, can show the symptoms of red blood. 2. Drugs: long-term application of large amounts of glucocorticoid creams can lead to skin atrophy and thinning, capillary expansion, thus forming red blood, resulting in hormone-dependent dermatitis. 3. Improper skin care: long-term application of irritating ingredients or hormone-containing skin care products will lead to skin fragility, sensitivity, and thus susceptible to external environmental stimuli caused by capillary congestion, the emergence of red blood. If you have symptoms of red skin, you need to go to the hospital in a timely manner to clarify the cause, and the doctor will issue an individualized treatment plan according to the situation, so as not to delay the condition.