In clinical practice, the following two conditions are common: first, trauma-induced scalp hematoma, if located in the subcutaneous dermis, the limitation is relatively small, while the subcapsular tendon layer is very loose, the hematoma is not easily limited to a larger size, usually need to use pressure bandages, hematoma still can not be absorbed, then need to cut the scalp to remove or liquefy after syringe puncture aspiration treatment. Second, superficial benign scalp masses, such as sebaceous cysts, or lipomas. Sebaceous cysts may form abscesses with positive fluctuating sensation if they are secondary to bacterial infection. Prompt incision and drainage and oral antibiotic treatment are usually required. For sebaceous cysts that are not infected, or lipomas are usually cured by complete excision under local anesthesia.