Different problems different types of encouragement.

Let's start by distinguishing the different types of encouragement that a person can file:
The encouragement is induced by external factors such as spicy foods, cigarettes, alcohol, coffee or excess sugar, which are transient breaths at the time of removing the external factor that induces this encouragement, the problem disappears. In the case of cigarette and coffee, is due to the concentration of the aromas in the oral tissues, and at the plate denote bacteria, this is totally transitory though it is unpleasant.
In the case of food seasoned with garlic or onion, when you start the digestion and that they go to the gut, the gases produced by the degradation of those ingredients go into the bloodstream and from there reach the lungs, all of which are being by exhaled breath and perspiration, this unpleasant odor disappears when metabolized completely the food ingested.
There is another type of breath, which is induced by a diet high in protein and also caused by excessive exercise, very common in high-performance athletes or in body-builder. This is due to a biochemical reaction in our body where it will produce in excess of ketones, leading to ketosis, which in most cases is transitory, or that disappears when reducing the consumption of protein and lower the pace of the exercise.
The breath as a result of some disorder or systemic disease such as diabetic patient, who by a high rate of glucose in the blood develops a breath ketones, with a smell of apples, very characteristic of the patient who does not have levels monitored glucose. The patient with severe kidney disorders develops other forms of encouragement. A hallmark of liver cirrhosis patient who presented in acute phase, is the stench liver, due to high levels of ammonia in their blood.