What is the pain on the right side of the brain? The main reasons for pain on the right side of the brain are as follows: first, if the pain on the right side of the brain is acute, with a history of drinking, emotional excitement, or staying up all night before the disease, the patient should be considered to have acute cerebrovascular disease, especially the possibility of cerebral hemorrhage, which requires a cranial CT examination to clarify; second, if the pain on the right side of the brain is persistent and chronic, with dull pain, then the patient should be asked if there is a primary intracranial tumor or metastatic tumor. If the pain on the right side of the brain is persistent and chronic with dullness, the patient should be asked if there are any psychiatric symptoms or slurred speech, and at this time, a cranial MRI should be done to find out if there is any primary intracranial tumor or metastatic tumor causing the pain; thirdly, for the pain on the right side of the brain, the patient should be asked if there is any previous history of migraine. If there is a discharge-like sensation radiating from the occipital region to the top and temporal region of the whole right side of the head, it is necessary to consider the possibility of neuralgia.