Patients with chest acne may be suffering from folliculitis, acne, sebaceous cysts, etc., which can be solved by applying medication or surgery. 1. Folliculitis: it is an inflammatory skin disease mainly involving hair follicles, which is caused by bacteria or fungi infecting the hair follicles due to damage. Red papules, itchiness, and pain will appear, etc. It can be treated by applying antibiotic ointment such as fusidic acid cream, mupirocin ointment, etc., or topical ketoconazole lotion, clotrimazole cream, etc., which is an antifungal drug. 2. Acne: It is a chronic inflammatory disease involving the sebaceous glands of the hair follicles, mainly seen on the face, chest and other parts of the sebaceous glands, which can also manifest as long acne. At this time, you can use topical adapalene gel, benzoyl peroxide gel, fusidic acid cream and so on. If necessary, oral isotretinoin, doxycycline and other drugs. 3. Sebaceous cysts: benign skin lesions in which sebum gradually accumulates to form cysts, usually caused by blockage of hair follicles orifices, but also may be caused by excessive sebaceous gland secretion, which can lead to localized single or multiple swellings, and need to be treated by cystectomy. All of the above medications should be used under the guidance of a doctor, avoid self-medication, it is recommended to consult a doctor in a timely manner.