Persistent bad breath can be a sign of gum disease, sinus infections, or gastric reflux (GERD). In some cases, it may also point to more serious health issues like diabetes, liver disease, or kidney problems.

A rotten egg smell is often caused by sulfur-producing bacteria living on the tongue or in deep gum pockets. It can also be a symptom of digestive issues or a sign that food particles are decaying in the mouth.

Yes, dentists can treat bad breath by performing professional cleanings to remove trapped plaque and bacteria. They can also fix broken fillings or treat gum infections that are the primary sources of the odor.

Halitosis can smell like many things, ranging from sulfur and rotten eggs to a metallic or sweet, fruity scent. Some health conditions can even cause breath to smell like ammonia, vinegar, or mothballs.