Minor bleeding in the brain is treated conservatively by internal medicine. If the bleeding volume is very small, intravenous medication is not required, and absolute bed rest is sufficient. Brain hemorrhage, regardless of the amount of bleeding, requires absolute bed rest because the active state can cause changes in blood pressure, which can easily cause hematoma expansion or rebleeding when fluctuating. The most common cause of cerebral hemorrhage is hypertension. Other causes such as congenital aneurysm, vascular malformation, blood system diseases and vascular amyloidosis can also cause cerebral hemorrhage and should be treated for the cause. In case of hypertensive cerebral hemorrhage, blood pressure should be actively controlled in the early stage. If there is no obvious cerebral edema, blood pressure can be lowered to the normal range relatively quickly, and it is recommended to use long-acting antihypertensive drugs and take them only once a day to ensure stable blood pressure and reduce fluctuations. If it is an aneurysm or vascular malformation, surgical treatment needs to be considered. If it is a hematologic disease, the cause should be identified and a hematology consultation should be requested for targeted treatment.