Nausea occurs commonly in sympathetic cervical spondylosis as well as vertebral artery cervical spondylosis. Sympathetic cervical spondylosis is due to chronic inflammatory lesions in the cervical spine area. When the cervical spine becomes fatigued, such as when the head is lowered for too long or when the pillow is not suitable for sleeping, the soft tissue inflammation in the cervical spine gradually increases and builds up, which will stimulate the surrounding sympathetic nerve chain. When the sympathetic nerves show hyperactivity or inhibition, symptoms of nausea and vomiting may occur. Vertebral artery cervical spondylosis is caused by the compression of the vertebral artery due to hyperplasia of the cervical spine and narrowing of the foramen of the vertebral artery. As a result, the vertebral artery becomes tense or spasmodic, affecting the blood supply to the brain and causing vertigo, which can be accompanied by nausea and vomiting.