Small bumps on the skin may be caused by milia, folliculitis, keratosis pilaris, and other causes. Patients can remove them through physical therapy, topical antibiotic ointment and retinoids. 1. Corns: Corns are benign lesions that are retention cysts originating from the epidermis or epithelium of the appendages. The epidermis can be punctured with a needle after local disinfection and small yellowish-white granules can be picked out. Or it can be removed by physical treatment such as carbon dioxide laser. 2. Folliculitis: It is an inflammatory reaction caused by infection of the hair follicle, usually caused by bacterial infection. It can lead to the appearance of localized small bumps. Erythromycin ointment, mupirocin ointment and other antibiotics can be applied as prescribed by the doctor to eliminate them. 3. Keratosis pilaris: a chronic follicular keratosis pilaris. Patients can follow the doctor’s instructions to apply the regulation of keratinization drugs, such as vitamin A acid ointment, salicylic acid ointment, etc. to eliminate. There are many reasons why there are small bumps on the skin, it is recommended to go to a regular hospital in time to identify the cause and treatment, and drugs need to be used under the guidance of a doctor.