My husband woke up bloated an has horrible rotten egg smelling burps then that follows with vomiting an watery bowl movements. horrible egg smell help?

Gastroenteritis: It sounds like symptoms of gastroenteritis may be related to the food eaten within 12-24 hours. If this has been going on for a while, may be related to chronic indigestion to certain food or just simply gerd. Please see a doctor.

Hydrogen sulfide: Rotten egg smell is usually from hydrogen sulfide- the gas is produced in the intestines and could explain the bloating. Foods which contain sulfur such as eggs, brussel sprouts, cabbages etc should be avoided for now.