A subdural hematoma is a collection of blood outside the brain. They’re usually caused by serious…

A subdural hematoma is a collection of blood outside the brain. They’re usually caused by serious head injuries. Bleeding and added pressure on the brain from a subdural hematoma can be life-threatening. Some stop and go away suddenly; others need surgical drainage.

In a subdural hematoma, blood collects between the layers of tissue that surround the brain. The outermost layer is called the dura. In a subdural hematoma, bleeding occurs between the dura and the next layer, the arachnoid.

The bleeding is under the skull and outside the brain, not in the brain itself. As blood pools, however, it puts more pressure on the brain. The pressure on the brain causes symptoms. If pressure inside the skull rises to a very high level, a subdural hematoma can lead to unconsciousness and death.

Subdural Hematoma Symptoms : Symptoms of subdural hematoma depend mostly on the rate of bleeding: 1. In head injuries with sudden, serious bleeding causing a subdural hematoma, a person may pass out right away or even go into a coma. 2. A person may appear normal for days after a head injury, but slowly become confused and then pass out several days later. This results from a slower rate of bleeding, causing a slowly enlarging subdural hematoma. 3. In very slow-growing subdural hematomas, there may be no noticeable symptoms for more than 2 weeks after the bleeding starts.

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