How is epilepsy diagnosed?

If you suspect you've had a seizure, see a doctor as soon as possible. A seizure can be a
symptom of a serious medical issue. To diagnose epilepsy, other conditions that cause
seizures should be ruled out. A doctor will probably order a complete blood count (CBC) and
the chemistry of your blood.
Blood tests may be used to look for:
● signs of infectious diseases
● liver and kidney function
● blood glucose levels
Electroencephalogram (EEG) is the most common test used to diagnose epilepsy. It's a
noninvasive and painless test that involves placing electrodes on your scalp to search for
abnormal patterns in your brain's electrical activity. You may be asked to perform a specific
task during the test. In some cases, the test is performed while you sleep.
Imaging tests can reveal tumors and other abnormalities that can cause seizures. These tests
might include:
● CT scan
● MRI
● positron emission tomography (PET)
● single-photon emission computerized tomography
Epilepsy is usually diagnosed if you have seizures, but there's no apparent or reversible cause.