Pimples on the back can be related to acne, folliculitis, and viral warts. They can be removed through medication, physical therapy, and surgery. 1. Acne: Acne on the back is usually related to acne, such as changes in hormone levels during puberty, frequent consumption of spicy and stimulating, oily food, keratinization of the sebaceous gland ducts of the hair follicles, which may lead to acne on the back. For localized inflammation, you can apply fusidic acid and mupirocin cream externally, which can help relieve the symptoms. 2. Folliculitis: Bacterial infection caused by folliculitis, resulting in back acne, can be applied externally with fusidic acid cream. Fungal folliculitis can be treated with topical ketoconazole cream and miconazole nitrate cream. 3. Viral warts: Viral warts are caused by human papillomavirus infection, which may lead to the appearance of superfluous skin. They can be removed by physical therapy such as freezing and cauterizing. Sebaceous cysts can also lead to back acne, if the area is large, if necessary, consider surgical excision treatment. Back acne is also related to other factors, it is recommended not to scratch the stimulus, but also to the hospital dermatology department, combined with the doctor’s advice treatment.