Signs of bleeding inside the skull tend to come on rapidly and include:
- A sudden headache
- Steadily increasing neurologic losses such as weakness, inability to move, numbness, loss of speech or vision and confusion
- Nausea and vomiting
- Loss of consciousness
Causes and Risk Factors
- Head injuries - For people under the age of 50, this is the most common cause of bleeding inside the skull.
- Abnormalities in blood vessels - in and around the brain, such as an arteriovenous malformation. These may be present from birth. They are only found if symptoms develop.
- Aneurysm - This is a weakening in a blood vessel wall that swells. It can burst and bleed into the brain leading to a stroke.
- High blood pressure - High blood pressure over a long time can weaken blood vessel walls.
- Amyloid angiopathy - This is an abnormality in the blood vessel walls. It occurs more often as we age. It may cause many small, unnoticed bleeds before causing a large one.