Headache at the back of the head may be occipital neuralgia, or it may be caused by trauma, brain tumor or high blood pressure. 1. Occipital neuralgia: the occipital nerve innervates the area of the occiput and neck, if the occipital nerve lesion occurs, it will be easy to have pain in the occiput and the corresponding part of the neck. 2. Trauma: If the head is accidentally hit or struck by violent factors, it can also cause headache and pain in the back of the head. 3. Brain tumors: especially tumors at the base of the skull, or cervical medulla tumors, etc. These tumors will compress the nerves in the occipital region, which will easily make the patients suffer from pain in the back of the head. 4. High blood pressure: high blood pressure may cause spasm of small arteries in the brain, and insufficient perfusion in the brain may easily lead to headache and pain in the back of the head. In addition to the above factors, other causes can not be ruled out, and it is recommended that when the headache symptoms persist, consult a doctor in time for standardized treatment.