Why would my breath smell like throw up?

Bad breath: Halitosis or fetor oris can be caused by many problems in the oral cavity such as periodontal pockets or tongue papilla that harbor microorganisms that cause bad breath. Sometimes severe bad breath can be caused by a systemic disease such as diabetes mellitus or liver impairment. To determine the exact cause, visit your doctor, then your dentist. Maintain good oral hygiene. Good luck.