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:
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.