A coma is a state of unconsciousness where a person is unresponsive and cannot be woken.

It can result from injury to the brain, such as a Head injury, severe or stroke . A coma can also be caused by severe alcohol poisoning or a brain infection (encephalitis) .

People with diabetes could fall into a coma if their blood glucose levels suddenly became very low (hypoglycaemia) or very high (hyperglycaemia) .

You may find the following information useful if you have afriend or loved one who isin a coma. It covers:

Whatis a coma?

Caring for and monitoring a person in a coma

What you can do as a visitor

Recovering from a coma

Support and more information

Content supplied by the NHS Website

Medically Reviewed by a doctor on 28 Nov 2016