The odor of the stool may be related to physiological factors such as eating too much stimulating food, or it may be caused by constipation, indigestion and other diseases. 1. Physiological factors: feces itself has a certain odor, if eating leeks, garlic and protein more food, may also induce fecal odor. 2. Constipation: constipation and organic lesions, dysfunction and other factors related to the patient will appear less frequent defecation, fecal dryness and other symptoms, if the long-term constipation, feces will accumulate in the body, long-term fecal odor will be heavier. 3. Indigestion: Indigestion may be caused by gastrointestinal dysfunction, Helicobacter pylori infection and other factors, patients will have abdominal pain, diarrhea and constipation and other symptoms, and some of the patients’ fecal odor is heavier. There are many reasons for the odor of feces, and after eliminating physiological factors, it is recommended that patients seek medical examination to clarify the cause of the disease.