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A subdural haematoma is usually caused by a blow to the head.

A subdural haematoma is usually caused by a blow to the head.
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Subdural haematoma

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A subdural haematoma is a collection of blood between the surface of the brain and the skull. It is an emergency condition that can result from a head injury. If there’s any chance you or someone you care for might have a subdural haematoma, it’s important to speak to your doctor straight away, visit your nearest emergency department or call an ambulance on triple zero (000).

Subdural haematoma causes

A subdural haematoma is usually caused by a blow to the head, such as in a fall, an assault or a road accident. The blow causes a blood vessel between the surface of the brain and a layer covering the brain to tear. The blood that flows from this blood vessel can’t escape the skull, so it gradually squashes the brain. This can cause brain injury.

Subdural haematoma types

Subdural haematomas are classified according to the length of time since the event that caused them. They can be:

  • acute (less than 2 days)
  • subacute (2 to 14 days)
  • chronic (more than 14 days)

Some people with chronic subdural haematoma have had only a mild head injury or no head injury that they can recall.

Subdural haematoma symptoms

The most common symptom is a headache, which can be very painful. Other symptoms include:

  • nausea and vomiting
  • confusion
  • loss of consciousness
  • difficulty speaking
  • difficulty with balance or walking
  • weakness and numbness
  • change in behaviour
  • being lethargic or very drowsy
  • seizures

Subdural haematoma diagnosis

If you have had a head injury, you should seek medical help immediately by calling an ambulance on triple zero (000) or going to the nearest hospital emergency department.

Your doctor will probably ask you questions and examine you. You might need a brain imaging examination such as a computed tomography (CT) scan.

Subdural haematoma treatment

The treatment of subdural haematoma depends on the type and size of haematoma and how serious the symptoms are.

Some people are simply watched carefully to see that they get better.

Others need emergency surgery to quickly reduce pressure in the brain and remove any blood clots, followed by medication and rehabilitation.

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Last reviewed: August 2018

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