Numbness in the head is mostly caused by nerves. Numbness in the head can be a symptom or combined with other clinical symptoms, and the more common comorbidities are headache, dizziness, lightheadedness, difficulty sleeping, insomnia and dreaminess, palpitations, panic, chest tightness, shortness of breath, and other symptoms. The causes of numbness in the head are: 1. Hypertension. After hypertension can stimulate the pressure receptors and pain receptors of the blood vessel wall, resulting in the feeling of head numbness. 2, cerebrovascular ischemic diseases. For example, cerebral infarction, vertebrobasilar artery insufficiency, transient cerebral ischemia, these diseases can make the brain hypoxia, and produce oxygen free radicals, toxic to brain cells, the above diseases are the most common causes of hair numbness. 3, other. For example, daily work and study life in the brain overuse, brain nerves in a state of long-term tension, carbon monoxide poisoning, side effects of drugs and other reasons, can also lead to head numbness.