The phenomenon of long closed mouth acne on the lower jaw is considered to be due to the lack of attention to hygiene, poor living and dietary habits, abnormal keratinization of hair follicle openings, etc., which can be relieved through the removal of causative factors, medication interventions, and acne clearing surgery treatment. 1. Removal of triggers: After the appearance of closed mouth acne, patients need to clarify the cause as soon as possible, can be related to usual not pay attention to personal hygiene, need to pay more attention to facial skin cleaning, but also need to maintain adequate sleep and eat a light diet to reduce the incidence of closed mouth acne. 2. Pharmacological intervention: patients can use topical retinoic acid cream, benzoyl peroxide, azelaic acid drugs, etc., so as to achieve the effect of improving skin keratinization and killing Propionibacterium acnes, to alleviate the phenomenon of mandibular long closed mouth acne. 3. Acne removal: For the phenomenon of long closed mouth acne in the jaw area, the contents of closed mouth acne can be squeezed out through the use of acne extruder to improve the patient’s symptoms. After the patient appears to have jaw long closed mouth acne, it is recommended to go to the hospital in time, and actively cooperate with the doctor to standardize the treatment, to alleviate the adverse symptoms.