5. KIDNEY FAILURE
Breath that has an ammonia-like odor can sometimes occur in people who suffer from chronic kidney failure. This smell is also described as urine-like or fishy. The kidneys remove wastes from the blood. When the kidneys fail, also known as end-stage renal disease, they are no longer able to remove toxins from the blood. Waste builds up throughout the body, and one of the ways they are released is through the respiratory system in the form of bad breath.