What are the causes and possible solutions for bad breath?

Avoid common causes: Halitosis (bad breath) after certain foods or drinks occurs for several reasons. Chemicals from some foods/drinks diffuse into the flesh in the mouth and throat. These chemicals (odors) keep coming out into the breath for many hours. Some foods/drinks cause odors when in the stomach. Stomach odors will come up through burps, and even without noticeable burps. Some substances stick to the teeth.

Mouth to stomach: Mouth: oral cavity is laden with bacteria, gums, ideep crypts of tongue and tonsils (mostly lymph tissue). Human bite is the dirtiest bite in animal kingdom, because we dont take care of properly. Softly brush all the teeth, gums and tongue (yes, tongue), twice daily, mouth wash/gargle. Acid reflux from stomach also a cause. Eat food slowly and relaxed, chew well, drink water, perhaps antacid rx.

Oral hygiene: Plaque/bacteria on the teeth and tongue. Sometimes if a tooth has a cavity or if gum disease is present, or if a dental infection is present, bad odors can occur. Odors can also come from the stomach.