In our practice we seen a lot of brain problems causing natural Earth radiation (so called Geopathic stress Zone) during sleep.
Picture represent those radiations crossing on head area at person “B”.
This is common hidden cause, that brain has to large potential and causing epilepsy, attacks.
Also, some types of radiation also could cause first symptoms and signs as chronic headaches, even brain tumor.
Other causes could be because of some side effects of medicines for other disease.