The best treatment for bad breath and constipation usually does not exist. Patients can use nursing care and medication to treat it. Bad breath and constipation are usually caused by indigestion and gastrointestinal and digestive disorders. 1. Indigestion: Indigestion is caused by overeating, not paying attention to hygiene, etc., and the accumulation of food in the stomach leads to bad breath, constipation and other symptoms, the patient can use to change the diet to regulate, should pay attention to the diet to easy to digest food, eat more fruits and vegetables, such as bananas, hawthorn and so on. Daily should drink more water to keep the circulation of gastrointestinal tract. 2. Gastrointestinal digestive system disorder: Gastrointestinal digestive system disorder can cause slow intestinal peristalsis as well as obstacles, thus causing indigestion of the body, which will make the patient have bad breath and constipation, the patient should pay attention to the light diet, and at the same time, the patient can take the medication such as morpholine and mosapride under the guidance of the doctor, and allergic people are forbidden to use it. It may also be caused by not paying attention to oral hygiene, diligent brushing and rinsing in daily life, if necessary, you can go to the hospital to clean your teeth.