There are many brain diseases: 1. The most common are cerebral infarction and cerebral hemorrhage caused by cerebrovascular disease. 2. Brain diseases can also be seen in occupying lesions, such as primary tumors and metastases. 3. Brain diseases can also be seen in infectious diseases, such as encephalitis and meningitis, where patients can experience headaches, nausea, vomiting, etc. 4. Brain diseases can also be seen in seizures, which are caused by abnormalities in the gray matter, epilepsy due to cortical developmental abnormalities, or epilepsy due to occupying, traumatic injuries. 5, Brain diseases can also be seen in seizures caused by abnormalities in cortical development, or epilepsy caused by occupancy or trauma.5. Brain diseases can also be seen in demyelination of the white matter of the brain, such as multiple sclerosis and concentric sclerosis.6. Brain diseases can also be seen in degenerative diseases, such as Alzheimer’s disease, motor neuron disease, etc.