Posterior headache causes include occipital neuralgia, cervical spondylosis, intracranial diseases, etc. 1. Occipital neuralgia: when the occipital nerve develops due to demyelination, nerve entrapment, etc., the symptoms of posterior headache can appear. 2. Cervical spondylosis: this disease is related to ligament hyperplasia, disc herniation and other compression of the cervical nerve root. At the onset of headache symptoms will radiate to the rear occipital region, the patient will have a back headache and other symptoms. 3. Intracranial diseases: including cerebral hemorrhage and intracranial tumor. At the onset of cerebral hemorrhage, the increase of intracranial pressure leads to meningeal irritation and posterior headache; intracranial occupational lesions due to the gradual increase of tumors, resulting in increased intracranial pressure and causing posterior headache. There are many causes of posterior headache, and it is recommended to consult a doctor in time to identify the cause and treat it actively under the guidance of the doctor.