There are several reasons for the pain on both sides of the back of the head: 1. It is caused by cerebrovascular disease, generally cerebrovascular disease includes cerebral infarction or cerebral hemorrhage, once there is this kind of disease, the patient will have pain on the back of the head. After this symptom, patients should go to the hospital in time for examination to make a clear diagnosis, and this disease can be clearly diagnosed through CT examination or nuclear magnetic examination. In addition, most of the triggers of cerebrovascular disease are caused by hypertension, hyperlipidemia and other underlying diseases.2. Pain in the back of the head may also be caused by colds, because after the occurrence of colds, many people will have a headache, dizziness, fatigue, and joint pains, which can be diagnosed clearly through the inquiry of the medical history and the conduct of blood tests.3. Pain in the back of the head may be caused by incorrect sleeping posture, or due to cervical spondylosis, which can be diagnosed clearly. The pain in the back of the head may also be caused by sleeping in an incorrect position, or due to cervical spondylosis and other nerve compression, which can be clearly diagnosed by taking a film in the hospital.