Sleeping inside the back of the head there is a ringing sound, may be cervical spondylosis, cerebral tinnitus caused by the patient should consult a doctor in a timely manner to clarify the cause of the disease after treatment. 1. Cervical spondylosis: sleeping with a ringing in the back of the head may be caused by cervical spine degenerative disease, such patients also have cervical back pain, upper extremity radiating pain, lower extremity numbness and other symptoms, can be localized under the guidance of the doctor’s physical therapy or surgical treatment. 2. Tinnitus: patients can hear sounds that do not exist in reality continuously or intermittently, which may be caused by mental stress, neurovascular lesions in the brain or neck, such people should keep their moods happy, and look for the causes of tinnitus under the guidance of a doctor and treat them. If there is a long term ringing in the back of the head while sleeping, it is recommended to consult a doctor in time for a clear diagnosis.