I had absence seizures when I was a kid but went undiagnosed until puberty when I had grand mal seizures. Didn't have seizures then for years and was off meds until after having my first child and going on birth control pills.
Nobody seems to to why they started or why they stopped.
I mention my obsevations merely to help anyone else that may be facing similar circumstances. FTR, strobe lights and driving on a sunny day has trigerred seizures for me in the past.