Intracranial complications of otogenic origin vary according to the different diseases of the ear. 1. Acute purulent papillitis or purulent otitis media can easily cause thrombosis of the transverse or sigmoid sinus, called intracranial venous thrombosis. Patients can have headache, nausea, vomiting, and fever, which can be clarified by magnetic resonance imaging and magnetic resonance venography of the skull. 2. Otogenic calculi or labyrinthine edema can cause dizziness, visual rotation with nausea and vomiting. 3. Inflammation of the ear can also cause intracranial infection of the skull, resulting in seizures, headache, nausea, and vomiting. At this time, a lumbar puncture can see that the protein and cell count are increased. Intracranial complications of otogenesis are mainly seen in the above points.