The most common clinical cause of frequent red nose is rosacea, which is a disease that occurs in middle-aged people aged 30-50 years old and is more common in women, and is a dermatologic inflammatory disease, mainly erythema in the center of the face, as well as dilated capillaries in the face. The cause of this disease is not very clear, some patients may have seborrheic dermatitis, local hair follicles and local repeated mite infections, patients like to drink, smoke, like to eat spicy and stimulating food, long-term gastrointestinal function is not very good, long-term constipation, women after menopause, some patients often stay up late, fire, emotional anxiety, weather and climate, etc. are the causes. This disease is mostly manifested in the tip of the nose and the sides of the nose erythema predominantly, lesions manifested as erythema, dilated capillaries and inflammatory follicles, papules and pustules.