How you prepare

By Mayo Clinic Staff

To prepare for an EEG:

  • Wash your hair the night before or the day of the test, but don't use any conditioners, hair creams, sprays or styling gels. Hair products can make it harder for the sticky patches that hold the electrodes to adhere to your scalp.
  • Avoid anything with caffeine on the day of the test, because caffeine can affect the test results.
  • Take your usual medications unless instructed otherwise.

If you're supposed to sleep during your EEG test, your doctor may ask you to sleep less or even avoid sleep entirely the night before your EEG.

May. 20, 2014