There are several possible causes of right brain pain as follows: 1. Migraine, also known as vascular headache, is the most common type of headache in which the patient is suffering from dysfunctional contraction and dilation of blood vessels in the skull or abnormal secretion of neurotransmitters such as 5-hydroxytryptamine. There are many triggers that lead to headache, such as blowing wind, getting cold, staying up late, drinking alcohol, etc. The headache is usually lateral, but can also be bilateral, with distension, throbbing pain and stabbing pain being the most common, and can be recurrent, with no abnormality in cranial CT. 2. cerebrovascular disease, causing right cerebral pain most commonly right cerebral hemisphere hemorrhage, patients who have hemorrhage at the same time, in addition to headache, often have nausea, vomiting and other high cranial pressure manifestations, and have motor impairment and sensory impairment of the contralateral limb. 3. intracerebral tumor, this This kind of pain usually starts slowly, but tends to worsen progressively. If the tumor is in the right side of the brain, the patient will gradually develop hemiplegia and weakness of the left side of the limb.