Currently, subdural effusions are treated mainly by surgical procedures, but they must also be viewed on a case-by-case basis. If the corresponding symptoms are mild, and the heart and lung function are not good, and the patient is older, treatment can also be done first by conservative medical treatment, such as active rehydration, promotion of brain reopening and oral medication to improve cerebral circulation and brain protection for proper neurological protection. If the amount of fluid still does not decrease significantly after more than one week, and the symptoms do not decrease, surgical treatment is required. Surgical procedures are mainly applied to patients whose medical treatment is ineffective, whose heart and lung function are still acceptable and who strongly request surgery.