What do you suggest if my friend recently stopped self harming and started to get seizures. i was wondering if they could have any remote connection. could they?

Well....: Sometimes people have seizure-like events which are due to underlying psychiatric issues. They look like epileptic seizures, but they aren't. It's possible your friend's psychiatric problems have taken on a different expression. Of course, it's also possible they have seizures and the seizures have acted like electro convulsive therapy. (This does actually happen from time to time)