Triangle always long acne may be due to diet spicy stimulation, do not pay attention to local cleaning and other reasons, must not be squeezed by hand, so as not to lead to the spread of infection; can be adjusted through life, but also according to the type of acne to choose the appropriate drugs for treatment. 1. For the case of frequent triangle acne, need to first adjust the living and dietary habits, try to eat a light diet, eat less spicy, stimulating greasy food, less alcohol, less late at night, do not smoke, pay attention to the local skin cleanliness and hygiene. 2. If acne-based acne, you can use retinoic acid drugs, such as retinoic acid cream and other local application; if inflammatory papules, pustular acne, you can use antiseptic and anti-inflammatory ointment, such as clindamycin gel and other application. 3. If the triangle area acne is more, recurring difficult to control, or acne is more serious, but also with oral medication, such as doxycycline, isotretinoin, etc., while supplementing vitamins and other nutrients. If the situation of acne in the triangle area persists, it is recommended to go to the hospital, under the guidance of the doctor for treatment, do not blindly use their own medication.