Forehead long closed mouth, also known as common closed mouth acne, can be removed through general treatment, medication, physical therapy and other methods. 1. General treatment: first of all, pay attention to do a good job of cleaning, can be appropriate to use warm water and neutral soap to clean the local skin, can reduce the adherence of the oil so as to block the pores; daily diet, try to avoid the intake of spicy and stimulating food. 2. Medication: (1) topical drugs: can be appropriate to use retinoic acid drugs coated local occlusion, can help dissolve and discharge acne, such as adapalene gel, tazarotene gel, etc.; can also be appropriate to use benzoyl peroxide for the application of treatment, which belongs to the peroxide, which can release the new eco-oxidant and benzoic acid, so as to kill Propionibacterium acnes, and promote the dissolution of pimples and astringency. (2) Oral medication: When acne develops into moderate to severe acne, antibiotic medication can be used appropriately, commonly used medications include tetracyclines such as minocycline, doxycycline, etc. Secondly, isotretinoin can also be used appropriately, which can reduce sebum secretion effectively and control abnormal keratinization and the formation of blackheads and pimples. 3. Physical therapy: photodynamic therapy, mainly combined with red and blue light irradiation and 5-amino ketovaleric acid, can effectively destroy Propionibacterium acnes and reduce inflammation, but can lead to pain and scabs or facial flushing and other adverse reactions. All of the above medications should be used as prescribed by a doctor. As each patient’s physical condition and condition is different, it is recommended that patients visit the hospital in time and choose the appropriate method to remove under the guidance of the doctor.