Chronic subdural hematoma (cSDH) is a collection of blood and its breakdown products in the subdural compartment. It is a condition frequently seen in any neurosurgical practice. cSDH is believed to arise from tearing of bridging veins as a result of trauma, which may be minor and unapparent to the patient. The one-year incidence rate is 1 to 8.2 per 100 000 in those 65 years or older. Advanced age is one of several risk factors and the incidence is expected to increase due to improved life expectancy. Other risk factors include brain atrophy, chronic alcoholism, intracranial hypotension, male gender and coagulopathy (including antiplatelet and antithrombotic therapy).