Rosacea, medically known as rosacea, is a chronic skin disease that occurs mainly in the center of the face with red spots and dilated capillaries. Rosacea occurs in young and middle-aged men and women, and is common in men aged 35 to 50, with a lower incidence in women than in men, and is more serious in men, affecting their appearance and social activities, especially in young patients. Therefore, the prevention and control of red nose, has been a matter of great concern to patients and their families. 1, the causes of rosacea caused by the complex causes of rosacea, specifically the following eight causes: (1) addicted to alcohol and tobacco and spicy food; (2) gastrointestinal disorders such as indigestion, habitual constipation; (3) cardiovascular disease and endocrine disorders; (4) menstrual disorders; (5) nasal cavity disease or other parts of the body with infectious lesions; (6) hair follicle worm mites cause disease. (6) Hair follicle mites. (7) climatic reasons cold climate and some bad climate change can cause vascular damage and degeneration of hoof tissue, resulting in chronic inflammation, blood stasis, passive expansion of the venous plexus under the dermal papillae and rosacea. (8) mental factors emotional tension, hypersensitivity, depression and fatigue will occur neuroendocrine regulation disorders, into the impact of vascular nerve regulation disorders, will aggravate rosacea. The Chinese medicine believes that rosacea rash is purple and red, occurring on the side of the nose or nasal furrow, is the lung, stomach, mostly caused by lung heat or heat of blood and Qi, the lesions are purple and red, and there is liver depression, is liver depression and Qi stagnation, the meridians are blocked by blood stasis. Pustules, papules, and nodular lesions are caused by poisonous evil. The nasal flab phase is caused by Qi and blood stagnation and poisonous evil within. 2, the prevention of rosacea good hygiene habits. Pay attention to personal hygiene, bathing, changing clothes, keep the face and hands clean, so that the normal discharge of facial sebum. Do not use your hands to touch, squeeze, pinch or pinch acne. Touching will cause inflammation and bacteria to develop deeper and spread to the nose, resulting in disfiguring scars. Furthermore, do not have close contact with people who have acne and rosacea (e.g., paste face, share towels), because acne and rosacea are caused by infection with mites, and mites come through contact and cross-infection, preventing infection with mites can prevent rosacea. Minimize sun exposure. You should minimize sun exposure, wear a wide brimmed sun hat and apply effective sunscreen when you go out in summer. It is not advisable to live or work in a hot, humid or hot environment for a long time. Avoid contact with irritants. Usually soap-free cleansers should be used, and astringents and abrasives should not be used. When suffering from acne and rosacea, it is best not to use cosmetics because they contain acne-derived substances, and they can aggravate rosacea and prolong the course of the disease. Patients with rosacea should not use cosmetics that are oily. Do not go to a beauty salon for treatment either, because beauty salons can only do skin cleansing and care. There are no doctors in beauty salons, only beauticians. Some skin diseases are not cosmetic problems, but need to be treated, and if not treated properly will cause adverse consequences. Patients with rosacea should also make a diary of rosacea triggers for 2 weeks continuously, noting down the reasons that may prompt an attack or aggravation of the condition, so as to clarify and avoid contact with these substances in the future. 3, diet (1) avoid eating spicy, alcohol and other hot and spicy stimulants. According to Chinese medicine, rosacea is caused by poor diet, heat accumulation in the lungs and stomach, external wind and blood stasis and condensation. You should avoid foods that promote facial skin redness, such as chili, mustard, raw onion, raw garlic, wine, coffee and other irritating foods; eat less greasy food, such as animal oil, fatty meat; fried foods, pastries, etc., to reduce the secretion of sebum. Eat more vitamin B6, vitamin B2 and vitamin A-rich foods and fresh fruits and vegetables. In addition, you can take V6 orally, metronidazole, two to three times a day until the symptoms disappear completely. (2) In particular, alcohol should be avoided, care should be taken to avoid cold and hot stimuli, and avoid emotional excitement and mental tension. Especially in mild cases, it should be treated with internal plus topical products at the same time. Generally, the B vitamins such as vitamin B2, B6 and vitamin B complex are taken internally. Oral tetracycline or metronidazole can also be taken. Do not scratch the affected area with your hands to prevent infection, and usually wash often with warm water while not washing with alkaline soap.