Dizziness in the back of the head may be due to insufficient blood supply to the brain, high blood pressure, neurasthenia and many other reasons. 1. Insufficient cerebral blood supply: Insufficient cerebral blood supply usually leads to ischemia and hypoxia in the brain, thus showing a variety of symptoms such as dizziness, lethargy, and dizziness in the back of the head. It may be caused by insufficient blood supply to the brain due to coronary atherosclerosis. 2. High blood pressure: high blood pressure for a long time will lead to poor vascular elasticity, hardening of the walls, there will be atherosclerosis so that the brain pressure increases, resulting in dizziness in the back of the head, and even accompanied by headaches or tinnitus, paroxysmal vertigo. 3. Neurasthenia: If prolonged neurasthenia or mental overstress, it is likely to lead to autonomic nerve disorders, resulting in insufficient blood supply and oxygenation of the brain, which will also appear in the back of the brain dizziness. When the back of the brain dizziness, need to go to the hospital to do the relevant examination and treatment, so as not to lead to aggravation of the condition.