A hard lump inside the chin hurts when pressed may be related to folliculitis, cystic acne, sebaceous cysts and other causes. 1. Folliculitis: It is mainly caused by bacterial or fungal infection, and is likely to occur on the head, face and neck. (1) If the folliculitis is caused by bacterial infection, it can be treated with oral antibiotics such as cefuroxime tablets and roxithromycin capsules under doctor’s guidance, or topical polymyxin b ointment can be applied to relieve the symptoms. (2) Fungal folliculitis: under doctor’s guidance, oral antifungal drugs (fluconazole capsule, itraconazole capsule, etc.) treatment, can also be used externally miconazole nitrate ointment and other treatments. 2. Cystic acne: mainly manifested by skin cysts, which are painful when pressed. This type of acne is prone to scarring and needs to be treated promptly with oral isotretinoin and antibiotics under the guidance of a doctor. At the same time, avoid squeezing acne with hands, pay attention to facial cleanliness, avoid eating spicy and stimulating foods, and eat a light diet to avoid aggravating the condition. 3. Sebaceous cysts: When the sebaceous gland ducts are blocked, the secretions are difficult to be discharged and accumulate, forming cysts. After bacterial infection, redness, swelling and pain appear. It needs to be treated actively and surgical removal under local anesthesia is recommended. When adverse skin problems occur, you should go to a professional dermatology hospital for examination in time to facilitate symptomatic treatment. At the same time, during the treatment, pay attention to local skin hygiene, avoid eating spicy stimulating food.