It is normal for stools to be odorless. The smell of feces and their own diet has a great relationship, when the diet is light, and do not eat a lot of protein-rich or greasy spicy food, the smell emitted by the bowel movement is not very strong, the stool can be no odor. Usually people who like to eat meat or greasy food, the smell of the stool is stronger, is the intestinal bacteria decomposition of food emitted, or in constipation when the food residues in the body fermentation time is too long, will be fermented to produce a foul smell. Normal feces are soft and yellow, with no fishy or foul odor. Therefore, it is normal for feces to have no odor, but the smell of feces alone does not determine whether the body is normal or not, and it should be combined with other symptoms to determine whether or not the symptoms are occurring. If there is any abnormality in the stool, it is recommended to consult a doctor in time, improve the examination to clarify the cause of the disease, and then give targeted treatment.