Red, swollen and painful pimples are usually caused by acne, boils, folliculitis, etc. Depending on the different diseases, you can choose either topical medication or oral medication to treat them. 1. Acne: Acne is a chronic inflammation of the sebaceous glands of the hair follicles, which is usually characterized by redness, swelling, tingling, pain, etc. Benzoyl peroxide can be used topically, which can slowly release the new eco-oxidants and benzoic acid, and has the ability to kill Propionibacterium acnes, dissolve pimples, and have an astringent effect. 2. Boils: Boils are generally caused by bacterial infection of hair follicles or sebaceous glands, usually with pus, redness, swelling, pain and other symptoms, can be treated with topical mupirocin and other medications, and if necessary, can be taken orally with antibiotics such as cefprozil. 3. Folliculitis: folliculitis generally refers to the symptoms caused by bacterial infection of the hair follicles, usually have local redness, swelling, pain and other symptoms, can be treated with drugs such as fusidic acid, with antibacterial effect. If there is redness, swelling and pain of acne, the patient should be in a timely consultation, the doctor’s guidance to identify the cause of the disease, and actively cooperate with the treatment.