Every single person has the potential for epilepsy. Epilepsy isn't something a person has for life but can very well be as there different levels of severity. So everyone has something called an "Epileptic Threshold", most people have a high threshold but some don't. The epileptic threshold can be lowered by stress, panicking, alcohol, drugs, hormones. These all increase suspectability to seizures. My point is, severe homesickness causes stress and panic, therefore can lead to seizures.