Worms in the head are parasitic infections of the brain, and the more common ones are cerebral cysticercosis. It is mainly caused by eating undercooked pork or raw pork and infected with tapeworms. After the tapeworm eggs penetrate into the stomach, they can enter the blood vessels of the gastrointestinal wall, and the larvae can parasitize in the brain parenchyma or brain ventricles through the blood circulation and cause cysts, which is called encephalocysticercosis. Generally, patients with cysticercosis will have persistent seizures, as well as symptoms of intracranial hypertension such as headaches, nausea, and vomiting. In addition, more common brain parasites, such as schistosomiasis infection of the brain, are also caused by schistosomes that enter the cranium partially after infecting the body.