Chronic subdural hematoma (CSDH) is one of the most common diseases in neurosurgery, and its incidence is increasing every year with the aging of the population and the widespread use of antithrombotic drugs. The majority of patients with CSDH have a good outcome with surgical treatment, but 5%-30% of patients still experience recurrence of hematoma and require readmission to the hospital. Common risk factors of hematoma recurrence include the patient factors such as gender, age and underlying disease, the imaging pattern of the hematoma at admission, the use of antithrombotic drugs, the mode of anesthesia, different surgical procedures, and adjuvant medications.