Usually you can use the following methods to determine whether you have bad breath: First, you can determine whether you have bad breath by smelling your saliva with your nose. Second, cover your nose and mouth with your hands so that the exhaled gas can be well smelled by your nose to determine whether you have bad breath. Third, to observe the color of their tongue, if the inside of the tongue is white, it means that there is bad breath, and this is also a manifestation of dampness in the body. Fourth, observe whether you have tooth decay, sometimes tooth decay will also make the mouth exists odor. Usually you must pay attention to brush your teeth every morning and evening, brush your teeth can remove most of the odor in the mouth, is the mouth to maintain a healthy state, do not eat some easy to fire food and irritating strong food. There are many ways to remove bad breath, not only to pay attention to the usual diet to light, brush your teeth every morning and evening on time, can also be good to briefly relieve bad breath phenomenon.