The causes of facial erythema formation are considered as follows: 1, skin diseases: can cause facial erythema, such as rosacea, lupus erythematosus and certain congenital capillary malformations. 2, drug-induced: capillary dilation, such as the frequent external use of drugs containing hormones, as well as cosmetics containing hormones, skin care products, or long-term oral calcium channel blockers such as antihypertensive drugs, can also cause facial capillary dilation, appearing 3, occupational factors: such as long-term occupational groups engaged in high temperature, welding, such occupations can also cause facial capillary dilation, facial erythema. 4, the living environment: long-term in the plateau, cold or long-term exposure to ultraviolet light environment, therefore causing facial capillary dilation. According to the different causes to target the prevention and treatment of facial erythema, for the problem of having facial erythema, it is recommended that patients go to regular hospitals to find qualified medical institutions, under the guidance of dermatologists for treatment.