harmonal imbalance

Perhaps you might mean (just a guess here) 'Hormonal imbalance'?

If so, type the keywords (and variations thereof) 'Hormonal imbalance and epilespy' in a search engine such as Google and you should get several hits.

As an example, I followed that method, and one of the hits is the following hyperlink on website Ehow:

http://www.ehow.com/how_4674396_hormone-imbalance-causing-seizures.html