The main causes of head numbness and swelling may include cerebral artery insufficiency, cervical spondylosis, tension headache, and mental factors, as follows: First, cerebral artery insufficiency: cerebral artery insufficiency is a common cause of head numbness and swelling, mostly seen in middle-aged and elderly friends with hypertension, diabetes, and hyperlipidemia, and patients are advised to use medication to control these risk factors well. Second, cervical spondylosis: cervical spondylosis is mainly due to herniated discs or cervical spine osteophytes that compress the anterior horn or anterior root of the peripheral nerve that governs the head, resulting in the phenomenon of numbness and swelling of the head. Third, tension headache: tension headache is mainly caused by emotional factors, manifesting as head swelling, tightness, and pain on both sides of the forehead, and generally the pain level is relatively light. Fourth, mental factors: sleep disorders, anxiety disorders, depression patients can also appear the above phenomenon.