Bleeding under the skin(a condition called Haematoma).
An operation to remove the Haematoma may be needed.
A blood clot
can collect beneath the skin(this is called a Haematoma).
The symptoms of an acute subdural Haematoma usually appear soon after a head injury.
Many people with a small subdural Haematoma can make a quick and full recovery.
A chronic subdural Haematoma can be difficult to detect
and can go unrecognised for some time.
Potential complications immediately after surgery include infection and Haematoma(internal bleeding), but the risks of such complications are small(1-2%).
Never give an intramuscular(IM) injection if a serious bleeding disorder is suspected,
or a very painful Haematoma will develop.
This is a very rare problem,
but may require an urgent operation to remove the Haematoma and relieve the pressure.
The symptoms of a chronic subdural Haematoma do not usually appear until about 2-3
weeks after the initial head injury.
This is a very rare problem but
you may need an urgent operation to remove the Haematoma and relieve the pressure.
Potential complications immediately after surgery include infection and Haematoma(internal bleeding),
but the risks of such complications are small(one to two per cent).
The treatment will depend on whether the Haematoma is sudden(acute) or long-standing(chronic),
the size of the Haematoma, and the symptoms that you have.
If your blood does not clot normally or you
take a blood-thinning medicine such as warfarin, you are more likely to get a Haematoma.
A collection of blood(a Haematoma) may collect near to the nerve,
due to damage to a blood vessel, caused by the needle or the catheter.
A full examination will be
done to look for signs of a possible subdural Haematoma and for signs of any other injury that you may have.
If there is a small, acute subdural Haematoma that is not producing any symptoms(or the symptoms are not severe),
it can sometimes be treated just by careful monitoring and observation.