I was just getting on here to look and see if anyone had posted about vagal nerve issues and gi issues. My husband was rear ended in early february. Over the last few months it seems that he caught a bug or some food disagreed with him without actually getting sick. He is showing symptoms of IBS. I am beginning to think that there was damage to the vagal nerve. Damage to this nerve can also cause problems with urination and other gastrointestinal problems like gastroperisis. I am wondering if the throwing up is a result of gastroperesis.