When the colonic flora is disordered, symptoms such as abdominal pain, bloating, chronic constipation, diarrhea and bad breath may occur. 1. Abdominal pain and bloating: When the intestinal flora is disordered, abdominal pain is usually not obvious, and it is most common in the left lower abdomen. However, there will be more obvious abdominal distension, which is usually relieved after defecation and gas evacuation. 2. Long-term constipation: intestinal flora disorders reduce probiotics in the intestines and weaken intestinal peristalsis, making it difficult to digest food and causing constipation. The symptoms include dry stools and difficulty in defecation. 3. Diarrhea: When the intestinal flora is disordered, the ability to absorb water decreases, resulting in diarrhea. Usually discharge yellowish or yellowish-green watery stools, sometimes also in the form of paste and egg, accompanied by mucus. If the condition is serious, dehydration and electrolyte disorders may occur. 4. Bad breath: When the intestinal flora is disturbed, the waste materials in the intestines can not be discharged, and the harmful bacteria in the intestines continue to multiply, producing various harmful substances and forming bad breath after fermentation. If the above symptoms occur, it is recommended to go to the hospital for examination and treatment under the guidance of the doctor.