Forehead are closed pimples may be abnormal androgen levels, sebum secretion, hair follicle mouth blockage caused by closed pimples refers to acne, can be under the guidance of the doctor, through the general treatment, medication (azelaic acid, etc.), other methods and so on for treatment. 1. General treatment: pay attention to cleanliness in life, use warm water or neutral soap to clean the face, to reduce the oil clogging pores, do not squeeze the closed mouth acne, and avoid staying up late, light diet. 2. medication: under the guidance of the doctor, through the use of azelaic acid, inflammation and acne has a therapeutic effect, but also can be used externally adapalene gel, tazarotene and other drugs for treatment. 3. Other treatments: In addition to the use of drugs, you can also choose the acne squeezer to squeeze out the closed mouth. It is recommended that patients go to the hospital, under the guidance of the doctor, according to the patient’s condition, targeted treatment.