The main reasons for dizziness in the back of the head are as follows: 1. If the patient has dizziness in the back of the head with stiffness and pain in the neck under the condition of poor rest or improper posture, it should be considered to be caused by cervicogenic vertigo. This is because the patient’s protruding intervertebral disc compresses the vertebral artery, resulting in dizziness and discomfort in the back of the head when the blood supply to the brain is insufficient. 2. The patient’s dizziness in the back of the head may also be caused by posterior circulation ischemia or posterior circulation infarction, and the patient must pay attention to it in this case. In addition to the feeling of dizziness in the back of the head, patients may also have nausea, body slanting to one side when walking or numbness and weakness of the limbs, cerebellar language.