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The symptoms of a subdural haematoma can develop soon after a severe head injury, or gradually over days or weeks after a more minor head injury.

Sometimes you may not remember hitting your head at all.

Symptoms of a subdural haematoma can include:

These symptoms can often be mistaken for other conditions, such as strokes, infections or dementia.

What to do

You should always seek emergency medical treatment after a severe head injury.

Go to your nearest accident and emergency (A&E) department, or dial 999 to request an ambulance.

If you develop the symptoms listed above any time after a minor head injury, or don't remember hitting your head, you should also go to your nearest A&E department or call 999 for an ambulance as soon as possible.

A subdural haematoma can be very serious and needs to be assessed as quickly as possible.

Read more about diagnosing subdural haematomas.