As our country enters an elderly society, the proportion and absolute number of elderly people in China are gradually increasing, and various geriatric diseases are quietly rising along with this trend, which not only erode the body of patients and bring unbearable pain to patients and their families, but also become a major social problem, affecting the stability and development of society. Common geriatric diseases such as hypertension, diabetes and coronary heart disease have long treatment cycles and mostly require lifelong medication, but there are also geriatric diseases that are treated well and can be completely cured if they are detected in time and treated effectively. Chronic subdural hematoma is a common type of disease in craniocerebral injury in the elderly. This disease is often caused by tearing of the bridging veins leading from the cerebral cortex to the venous sinuses, with little bleeding in the early stages of injury, and clinical symptoms do not occur immediately, but only after more than 3 weeks due to the increasing blood. Of course chronic subdural effusion can also gradually evolve into chronic subdural hematoma. The disease tends to occur in elderly people over 50 years of age, and the course of the disease is often long, more than 3 weeks, and some cases can reach several months or even years, due to the long history of the disease, a considerable number of patients do not or cannot recall the history of trauma, and for patients with a history of trauma also show a history of minor trauma, so patients often lack vigilance. With the increasing subdural hematoma, the clinical manifestations of patients are mainly increased intracranial pressure, headache is more prominent, some have mental symptoms such as dementia, apathy and mental retardation, and a few may have focal brain symptoms such as hemiplegia, aphasia and epilepsy. Cranial CT and cranial MRI can accurately diagnose this disease. The treatment of chronic subdural hematoma is divided into surgical treatment and conservative treatment, of which surgical treatment is divided into borehole drainage and cranial hematoma removal surgery. Clinical practice shows that due to the special pathogenesis of this disease, the success rate of conservative treatment is not high, and there is a risk of brain herniation and sudden respiratory and cardiac arrest; while borehole drainage surgery has become the preferred method for chronic subdural hematoma treatment due to the small trauma, short operation time, exact effect and low cost. Due to the high trauma, long operation time and high cost, open hematoma removal surgery is only suitable for: 1) failed borehole drainage surgery; 2) blood clot not liquefied and cannot be drained; 3) calcification of the cyst wall, and the residual cavity cannot be closed after drainage. etc. Sincerely remind: the elderly should go to the hospital promptly once they develop abnormalities such as headache, dizziness, dementia, apathy, unconsciousness, and weakness of limb movement, etc. Chronic subdural hematoma caused by minor head trauma can take up to several weeks or even longer until obvious symptoms appear. Therefore, it is often difficult for the patient to recall the minor head trauma at the time of the visit. Treatment of chronic subdural hematoma is best done surgically and has a good prognosis.