What exactly is subdural hemorrhage?

Blood abutting brain: Subdural hemorrhage is bleeding between the inner and middle layers of the tissues wrapping the brain. It can be secondary to trauma or occur spontaneously, especially in patients with significant brain atrophy. Depending on size and rate of growth they can often be managed conservatively, but sometimes require neurosurgical drainage.

Post-traumatic: A subdural is blood accumulating under the covering of the brain, dural meninges. Typically secondary to trauma but may occur spontaneously, in pts with bleeding problems or anticoagulants. Signs of symptoms may be absent in older pts, but headaches and focal weakness may be seen. Surgery is often needed to remove the blood clot.

SDH: A subdural hematoma typically occurs from bridging cortical veins being torn causing blood to accumulate on the surface of the brain under the dural covering of the brain. Trauma is the most common cause. In the elderly, even relatively minor head trauma can cause a sdh. Surgery is often used to evacuate the hematoma.

Dr Tomeski agreed