A hematoma subdural is a type of bleeding that occurs between the outer layer of the brain and the inner layer of the skull. This condition often results from head injuries, where blood vessels are torn, leading to the accumulation of blood in the subdural space. Symptoms can include headaches, confusion, and changes in consciousness, depending on the severity of the bleeding. Diagnosis typically involves imaging tests like a CT scan or MRI to visualize the blood collection. Treatment may require monitoring or surgical intervention to remove the accumulated blood and relieve pressure on the brain. Early detection is crucial for better outcomes.