Scalp numbness after frontal lipoma surgery is generally a normal physiological phenomenon caused by poor local blood circulation after surgery, and it may also be caused by anesthetic effect not disappearing as well as cutaneous nerve injury. 1. Physiological phenomenon: after forehead lipoma surgery, patients may have the symptom of scalp numbness after forehead lipoma surgery due to poor blood circulation caused by postoperative local bandage and compression, which is a normal phenomenon. 2. The effect of anesthesia has not disappeared: the phenomenon of scalp numbness after frontal lipoma surgery may be caused by the effect of local anesthesia has not disappeared in a short period of time, so the patients will still have the symptom of scalp numbness after frontal lipoma surgery. 3. Dermal nerve injury: Dermal nerve injury is caused by the patient’s accidental injury during surgery, and the main symptoms of the patient are skin numbness, pain, itching, ant crawling sensation and so on. Therefore, patients will have the performance of scalp numbness after forehead lipoma surgery. When patients have the symptom of numbness of scalp after forehead lipoma surgery, it is recommended that patients seek medical treatment in time, and the doctor will determine the cause.