When numbness and dizziness occur at the back of the head, the first thing to consider is a problem with the cervical spine. Neck strain, exertion and cervical spondylosis can cause inflammation, hyperplasia, adhesions and small joint misalignment in the soft tissues of the neck muscles and fascia, and these pathological changes can compress the nerves and blood vessels in the neck. The sensations in the back of the head are all innervated by the nerves in the neck, and if these nerves in the neck are compressed, numbness, discomfort and even pain in the back of the head will occur. Compression of the blood vessels in the neck can cause a lack of blood supply to the brain, which can lead to dizziness. Therefore, if there is numbness and dizziness in the back of the head, coupled with a history of cervical strain and strain injury, the first consideration is the cervical spine. In addition, head and intracranial lesions can also cause numbness and dizziness in the back of the head. To make a definite diagnosis, the necessary tests should be done, the most common of which are cranial CT scan and MRI.