Blood around brain
There are three layers of tissue that surround the brain, known collectively as the "meninges.
" the outermost layer is the dura mater, the middle layer the arachnoid mater, and the layer closest to the brain the pia mater. When veins that go between these layers rupture
- often because of trauma - blood can start to pool between the dura mater and arachnoid mater causing a subdural hematoma