The site of deep headache is in the head, and the department to which it belongs is internal medicine, neurology, and the diseases associated with it are brain abscess, headache, meningitis, hydrocephalus, meningioma, cranial fossa meningioma, and intracerebroventricular meningioma. Deep headaches are most often seen in brain abscesses, encephalitis, and brain tumors with external radiation to the ipsilateral side. Possible associated symptoms are throbbing headache, convulsions, epileptic headache, dull pain, excessive dreaming, nausea, fatigue, and recurrent headache. Deep headache is mainly due to intracranial blood circulation and cerebrospinal fluid circulation (cerebrospinal fluid circulation pathways: left and right ventricular choroid plexus – via interventricular foramen → third ventricle – via middle cerebral aqueduct → fourth ventricle – via median foramen and lateral foramen → subarachnoid space → arachnoid granules → superior sagittal sinus → sinus confluence → right and left transverse sinus → (left and right sigmoid sinus → internal jugular vein) disorders and increased intracranial pressure, which stimulates cerebral vessels and meninges. Superficial headaches are often caused by diseases of various organs of the head. Headaches caused by nasal or paranasal sinuses are mostly vague or dull and often limited to the sinus area; ear diseases such as otitis media and external ear canal boils can cause ear pain; headaches caused by eye diseases are mostly vague pain near the eye and in the posterior occipital region; headaches caused by refractive errors are often dull and heavy in the frontotemporal region; glaucoma can cause severe headaches that are initially limited to the vicinity of the eye and are accompanied by nausea, vomiting, diminished vision, and increased intraocular pressure, Glaucoma can cause severe headache, accompanied by nausea and vomiting, reduced visual acuity, dilated pupils, increased intraocular pressure, etc.; the pain caused by dental diseases is mostly limited to the teeth, and is persistent and boomerang pain.