Constipation can lead to the accumulation of stool, poor discharge and induce bad breath, the treatment of constipation, bad breath to take the following way: a. should drink more water, eat more fiber-rich fruits and vegetables, such as celery, cabbage, bananas, apples, etc., and appropriate exercise to speed up the peristaltic function of the stomach and intestines. Second, if the constipation is not relieved after dietary therapy and lifestyle improvement, and bad breath cannot be improved, it is recommended to take non-stimulating laxatives such as lactulose and polyethylene glycol, and add intestinal probiotics such as bifidobacteria to improve the internal environment of the intestine, accelerate the excretion of stool, but also to relieve the constipation caused by bad breath. Third, if after the above methods still can not be relieved, you can temporarily add stimulating laxatives such as senna and rhubarb, but such stimulating laxatives can only be taken briefly, not long-term, frequent use, otherwise it will lead to colonic melanosis.