The triangle area is mainly in the nose root area of the face to both sides of the mouth corner line area, at present, according to the different reasons for acne, generally considered as non-disease factors caused by simple acne and disease caused by nasal bulges. A, non-disease factors often eat spicy and stimulating, greasy and high sugar food, long time in the hot and humid environment, mental stress, often stay up late, fire or in the use of cosmetics after removing makeup is not clean, etc., may make the sebaceous glands of oil secretion, blocking the pores of the facial triangle, oil excretion does not work, will cause acne in the triangle, this should pay attention to improve the daily lifestyle, eat more light food The actual fact is that you will not need special treatment. Second, disease factors 1, rosacea: the cause is not yet clear, often occurring in the middle of the face, the tip of the nose and nasal wing, mainly manifested as local skin flushing, oil, heavy patients can appear red papules, pustules, and even produce nasal redundancy; mild patients can use clindamycin and erythromycin gel, metronidazole gel and other local topical, when severe or developed to the nasal redundancy stage, it is necessary to laser or surgical treatment The pathogenesis of perioral dermatitis is still unclear, probably related to the long-term use of fluorinated corticosteroids and fluoride toothpaste, other factors and hair follicle infection and chemical factors, often occurring in the perioral area, nasolabial folds and cheeks, mainly manifested as scattered follicular erythematous papules, papules, papular pustules on the basis of perioral erythema; the disease should first stop using fluorinated corticosteroids topical drugs The disease should first stop using fluorinated corticosteroid topical medications and fluorinated toothpaste, and for those with follicular infection, oral tetracycline, erythromycin, etc.; 3.