Chronic subdural haematoma is predominantly a disease of the elderly. The commonest mode of presentation is an altered mental state, which causes diagnostic diffi culties. Although morbidity and mortality is high in untreated cases, early detection and neurosurgical intervention improves outcome significantly. In this article, Drs Sanjeevikumar Meenakshisundaram and Sanjay Suman discuss the risk factors, clinical presentations and management of this condition.