Taking probiotics gastrointestinal reaction is obvious may be the role of probiotics, may also be acute gastroenteritis, ulcerative colitis and other diseases. If it is the role of probiotics, you can stop using probiotics, symptomatic treatment; if it is acute gastroenteritis should ceftriaxone anti-infection; ulcerative colitis give p-aminosalicylic acid treatment. 1. the role of probiotics: some people may be sensitive to probiotics, probiotics to promote gastrointestinal motility, to promote the digestion and decomposition of food, there may be abdominal bloating, exhaustion symptoms, there may also be abdominal pain, diarrhea, gastrointestinal response to the obvious can be discontinued probiotics, to give symptomatic treatment, such as bloating can be applied to simethicone, diarrhea, take montelukast. 2. Acute gastroenteritis: it is common for unhygienic diet to lead to bacterial infection causing gastrointestinal inflammation, gastrointestinal mucosal congestion and edema, diarrhea, abdominal pain and other gastrointestinal reactions. Treatment can be ceftriaxone, levofloxacin and other anti-infective treatment. 3. Ulcerative colitis: it is an autoimmune disease, common symptoms are mucus, pus and blood stool, urgency (discomfort in the lower abdomen, wanting to relieve the bowel movement, and a feeling of incomplete defecation after defecation), abdominal pain. Treatment should be given p-aminosalicylic acid preparations, and in severe cases, glucocorticoids. Those who have significant gastrointestinal reactions after taking probiotics should go to the hospital to find out the cause and be treated under the guidance of a doctor.