Numbness and dizziness at the back of the head should, first of all, be considered a problem of the cervical spine, commonly known as cervical spondylosis. Cervical spondylosis can result in aseptic inflammation of the neck muscles, fascia, ligaments, small joints and other tissues, misalignment of the small joints of the cervical spine, cervical osteophytes, herniated discs, hypertrophy of the ligamentum flavum and spinal stenosis, etc. These pathological changes can compress or stimulate the nerves and blood vessels in the neck, and after the nerves are compressed for a long time, they can be damaged and numbness in the back of the head can occur. Stimulation or compression of the neurovascular can lead to spasm or stenosis of the vertebral artery in the neck, which further leads to dizziness due to insufficient blood supply to the brain. Next, craniosynostosis should be considered and appropriate tests, such as CT or MRI of the head, should be done to exclude head lesions.