Arm acne extrusion of white particles, may be sebaceous cysts, infectious molluscum contagiosum, folliculitis and other inflammatory diseases caused. It is recommended to pay attention to local care, give medication or surgical treatment if necessary. 1. Sebaceous cysts: Sebaceous cysts are sebaceous gland secretions that can’t be discharged from the hair follicles, and are caused by localized aggregation, and are mostly seen in adolescent people. It is recommended not to squeeze with hands to avoid inducing infection. If necessary, through the cystectomy, the cyst will be completely removed, if accompanied by infection need anti-infection treatment. 2. Molluscum contagiosum: this disease is usually associated with molluscum contagiosum virus infection, with the hand or tweezers and other local extrusion, can be extruded white molluscum contagiosum small body. It is usually treated with wart pinching and wart scraping; if the patient can’t tolerate it, salicylic acid ointment and imiquimod cream can be given to improve or reduce the symptoms. 3. Folliculitis: Folliculitis is caused by bacterial infection and may occur in the arm area leading to localized acne, when folliculitis pus can be extruded white pus or pus plugs. Patients can use topical erythromycin ointment, fusidic acid cream local application, can also be under the guidance of the doctor oral treatment of sensitive antibiotics; if the local has formed abscess, can be surgical incision drainage treatment. It is recommended that patients with arm acne extruding white particles go to the dermatology department of the regular hospital in a timely manner, and follow the doctor’s instructions for standardized treatment after a clear diagnosis.