Scars are generally referred to as keloid scars, and proliferative scarring and atrophic scarring may occur after bumping, which can be treated by medication, surgery, injection and filling. 1. Proliferative scar: If proliferative scarring occurs after a bump, it can be treated by applying silicone preparation under the guidance of a doctor, and if the effect of silicone preparation is not good, it can also be treated by local injection of 5-fluorouracil, betamethasone and other drugs. If conservative treatment is ineffective or the condition is serious, surgical resection, keloid contracture release surgery and other surgical treatments can be performed. After surgery, combined with localized superficial radiotherapy can reduce the recurrence rate. 2. Atrophic scar: When atrophic scar occurs after a bump, surgical excision of scar tissue can be carried out, and when the scar area of the patient is large, injection of autologous fat or hyaluronic acid and other substances can be injected into the scar area for filling treatment. When scarring occurs, it is recommended to be admitted to the hospital for examination and to cooperate with the doctor for treatment, so as not to affect the aesthetics.