Neck pain and headache may be caused by incorrect sleeping position, insufficient blood supply to the brain, or cervical spondylosis. 1. Incorrect sleeping position: Incorrect sleeping position may lead to falling pillow, causing neck pain and headache. Adjusting the sleeping position or massaging the painful area can relieve it. 2. Insufficient cerebral blood supply: Insufficient cerebral blood supply causes poor oxygen supply to the brain, which may lead to necrosis of brain tissues due to hypoxia and ischemia, triggering cerebral infarction and headache and neck pain. 3. Cervical spondylosis: when the cervical spine is diseased, the cervical intervertebral disc is herniated, which may compress the nerve roots in the neck, and neck pain and headache appear. After excluding neck pain and headache caused by improper sleeping posture, patients should go to the hospital as soon as possible to seek medical treatment, clarify the cause of the disease, and treat the symptoms according to the specific condition under the guidance of the doctor.