Pain in the back of the head is not necessarily a brain tumor, headache is one of the most common clinical symptoms, the etiology of which is very complex and common in the nervous system: 1, intracranial lesions: such as brain tumors, cerebral hemorrhage, subarachnoid hemorrhage, cerebral edema, meningitis, brain tumors, and hydrocephalus, etc.; 2, the high dilatation of intracranial and extracranial arteries and the surrounding structures are involved: such as migraine, fever, hypoxia, hypoglycemia, hypertension, carbon monoxide poisoning After the use of vasodilators and epileptic seizures, temporal arteritis, occipital arteritis and venous sinusitis, can also cause severe persistent headache; 3. Functional or psychiatric disorders: Including frontal, temporal, cervical and posterior occipital muscles, which can be contracted due to psychogenic factors, occupations, chronic inflammation, traumatic exertion and lesions of neighboring tissues, etc., resulting in tension headache; 4. Nasal origin headache, such as sinusitis; ocular origin headache, such as glaucoma; headache of ear origin, such as otitis media; 5, ligament, muscle and upper spinal joint lesions associated with headache: such as cervical spondylosis; 6, biochemical or endocrine changes in systemic diseases are also the cause of headache, such as diabetic neuropathy, menstrual headache and so on. The main causes of pain in the back of the head are migraine, cervical spondylosis, posterior cranial fossa tumors, hypertensive disease and so on.