The hard inside of pimples on the body is considered to be folliculitis, acne, boils and so on, mainly medication, surgery and so on. 1. Folliculitis: In most cases, skin infection with Staphylococcus aureus will cause a small amount of inflammation of the hair follicles, usually will gradually recover, do not need special treatment, but if it is a large area of the symptoms are more serious, you can apply antibiotic ointment, such as compound polymyxin B vitamins ointment, fusidic acid cream and so on. 2. Acne: Acne is a chronic inflammation of the sebaceous glands of the hair follicles and is mainly treated with medications, the more commonly used medications are adapalene gel, retinoic acid ointment, benzoyl peroxide and so on, and for severe symptoms, oral antibiotics can be taken, such as doxycycline and minocycline. 3. Boils: acute purulent inflammation of the hair follicles and deep surrounding tissues of the hair follicles, initially consistent with the performance of folliculitis, and gradually increase in size in the later stages, showing a red, hard nodule, with pain or tenderness, 2-3 days later, the nodule pus, necrosis, and the formation of abscesses. In the early stage, topical antibacterial drugs can be used including mupirocin ointment, fusidic acid cream, etc.; if the pus becomes unresolved, it can be surgically incised and drained. Body acne inside the hard there may be other reasons (such as sebaceous cysts), go to the hospital in a timely manner, for the cause, standardized treatment, the above drugs should be used in accordance with medical advice.