my daughter has been having seizures since birth, known condition, but recently she is having seizures after or during bowel movements, she is now 18 years old. On seizure med, and has a vagal nerve stimulator, every time she has a bowel movement causes seizures, movement is soft, so she is not straining as far as I can tell, could it be the stimulator, as the vagus nerve runs to the stomach and intestines? any ideas will help please. Thanks