Are there any risks or side effects?

The EEG procedure is painless, comfortable and generally very safe. No electricity is put into your body while it's carried out. Apart from having messy hair and possibly feeling a bit tired, you won't normally experience any after effects.

However, you may feel lightheaded and notice a tingling in your lips and fingers for a few minutes during the hyperventilation part of the test. Some people develop a mild rash where the electrodes were attached.

There's a very small risk you couldhave a seizure while the test is carried out, but you'll be closely monitored and help will be on hand in casethis happens.

Content supplied by the NHS Website

Medically Reviewed by a doctor on 21 Dec 2018