Undigested fungus in the stool is mostly abnormal and should be treated to improve digestion. Fungus is relatively easy to digest. After eating fungus, the stomach and intestines can help to break it down and form feces that can be excreted from the body. If there is undigested fungus in the stool, it means that the stomach and intestines have not digested all the fungus, and the body has indigestion problems. If you have undigested fungus in your stool, you may have eaten too much fungus at one time, and your stomach and intestines are overburdened with digestion. At this time, you should drink more water, appropriate exercise, abdominal massage, you can also take some gastrointestinal tablets to promote digestion. The use of medication should be directed by a doctor. Often found in the stool of undigested food, should promptly go to the regular hospital gastroenterology consultation.