People with high incidence of rosacea include: 1. people who are addicted to smoking, alcohol and spicy and stimulating food; 2. people with gastrointestinal disorders such as indigestion and habitual constipation; 3. people with cardiovascular diseases and endocrine disorders; 4. people with menstrual disorders; 5. people with diseases in the nasal cavity or infected lesions in other parts of the body; 6. people with hair follicle worm mites. Etiology 1. Climatic causes: cold climate and some severe climate changes. 2, mental factors: emotional tension, hypersensitivity, depression and fatigue can occur neuroendocrine regulation disorders, which in turn affect the vascular nerve regulation disorders, will aggravate the rosacea.