The cause of rosacea is unknown. It may be based on seborrhea, but certain factors such as alcoholism, irritating food, high temperature, cold, emotional stress, etc. may cause a dysregulation of the vasodilator nerves in the affected area, resulting in long-term capillary dilation. In recent years, it is believed that the helminth mite (commonly known as Trichogramma) plays an important role in the development of the disease. Symptoms: divided into three stages 1, erythema phase: erythema first appeared on the tip of the nose and nasal wing, erythema and then persist, and accompanied by capillary dilation. 2.Papular pustular phase: papules and pustules appear on the tip of the nose and both sides of the cheeks, and the expansion of the spiral capillaries is more obvious. 3, nasal superfluous stage: due to long-term chronic congestion, resulting in the proliferation of connective tissue in the nose, nasal tip hypertrophy shaped like a nasal superfluous, the surface is uneven, sebaceous gland mouth enlargement, can squeeze out white sticky sebum, capillaries more significant. Diagnosis: The skin lesions are mainly in the center of the nose and its surrounding areas, with typical symptoms, mostly in middle-aged people, with mild self-conscious symptoms and a chronic course. Treatment: 1, adjust the gastrointestinal function and endocrine disorders, avoid alcohol, do not eat spicy food, avoid hot and cold stimulation, etc.. 2, internal use of vitamin B drugs, such as vitamin B2, vitamin B6, etc., methotrexate, 0.2 grams, three times a day, tetracycline 0.25 grams, four times a day. 3.External medication; 1% mirex cream, compound sulfur lotion or sulfur cream. 4.Laser treatment: Stage I-II main damage for papules, pustules, erythema, capillary expansion, available new adjustable frequency laser or intense light treatment. Phase III nasal flab phase has been used in the past to mechanical skin grinding, blade grinding, freezing, electrosurgery removal and ordinary carbon dioxide laser treatment is the main, these treatments have some effect, but there are some problems. 5, Chinese medicine treatment: clear heat and cool the blood, activate blood circulation and remove blood stasis, with peach and red four-item soup plus reduction, or even forsythia poison pills, anti-feng tong shen pills, etc.