If you have this condition, fruity breath can be a sign that your body is using fat for fuel instead of sugar (glucose). That probably means you’re running very low on the hormone insulin, and you should call your doctor.
This is a kind of bacteria linked to stomach cancer and ulcers. It can cause stinky breath, and you may have nausea, heartburn, stomachache, or indigestion, too. Your doctor can test you for it — many of these symptoms go away when the bacteria is killed with antibiotics.
Colds, coughs, and sinus infections can send mucus filled with bacteria through your nose and mouth. That can affect your breath. It usually goes away once you get over your cold.