Bad breath and unformed stools may be caused by indigestion, gastroenteritis, Helicobacter pylori infection and other factors, it is recommended that under the guidance of the doctor, to carry out the correct targeted treatment. 1. Indigestion: patients with indigestion may have bad breath and unformed stools, which mainly refers to the fact that food can not be digested in the patient’s stomach, resulting in abnormal fermentation of food retained in the stomach to produce a bad smell, so bad breath and unformed stools occur. 2. Gastroenteritis: gastroenteritis may also cause bad breath and unformed stools, because gastrointestinal infection with viruses or bacteria can cause excessive secretion of gastric acid and bad breath and unformed stools, which are often accompanied by abdominal pain and diarrhea. 3. Helicobacter pylori infection: in the Helicobacter pylori infection in the population, some patients may show a series of symptoms such as bad taste in the mouth, abdominal bloating, unformed stools, etc., and need to use medication under the guidance of a doctor to sterilize the treatment. It is generally common to treat with a four-drug combination of bactericidal therapy, using one acid suppressant such as omeprazole, one bismuth agent such as bismuth potassium citrate, and two antibiotics such as amoxicillin and furazolidone. If the patient has symptoms of bad breath and unformed stools, in which the cause of bad breath may also be related to gingivitis and other oral diseases, it is recommended to consult a doctor in time, under the guidance of the doctor to clarify the cause and correct treatment.