Constipation bad breath is caused by constipation, i.e., an imbalance of in and out substances, where a large amount of stool accumulates in the intestines, causing intestinal bacteria to ferment and produce gas. The gas is not only in the digestive tract and intestines, but can also pass upward into the stomach and be expelled through breathing or speaking, resulting in bad breath. For the above patients it is recommended to improve constipation by consuming vegetables and fruits, which have a lot of fiber. It is recommended that older children or adults eat about 1 pound/day of raw vegetables, cooked and divided into three meals or two meals. Some patients do not have the habit of consuming vegetables, it is recommended to start with vegetable congee, gradually can be wrapped dumplings, wrapped ravioli, can be from 0.3-1 catty gradual increment. In addition to consuming vegetables, you should drink more water to increase the intestinal fluid in the intestinal tract, which is conducive to defecation, and you can consume probiotics or yogurt when you are in a position to do so.