The most effective treatment for sub scalp cysts is to opt for surgery, which can be performed by the patient under local or intravenous anesthesia. In the case of large subcutaneous cysts, preparations for skin grafting are also needed if necessary. It belongs to a common benign disease, the chance of recurrence after surgical excision is very small, in the operation should pay attention to hemostasis, the cyst lesion intact peeling and excision. After surgery, the large residual cavity needs to be induced drainage to avoid the formation of hematoma or effusion, and local pressure, bandage; after surgery, according to the needs of the condition of the drugs given to prevent infection, and regular medication change. Many cysts are related to trauma, and there is also a certain genetic factor, which can usually be clarified by physical examination, and if necessary, head CT and other imaging examinations can also be carried out.