The amount of time a patient should take probiotics after a colonoscopy procedure needs to be determined on a case-by-case basis, with a week of post-operative probiotic supplementation if necessary. 1. Routine situation: generally patients do not need routine supplementation of probiotics after undergoing colonoscopy surgery. This is because colonoscopy treatment often needs to wash the intestine, which will lead to a certain impact on the environment of the intestinal lumen, resulting in the proportion of flora, species and intestinal pH and other conditions are affected, but generally are temporary, do not need to supplement probiotics. 2. Irritable bowel syndrome: if the patient suffers from this symptom before surgery, or there is a transient intestinal dysfunction, probiotics can be supplemented after undergoing colonoscopic surgery. 3. Diarrhea: Probiotics can be supplemented if symptoms of diarrhea occur after surgery, along with recurrent enteritis, excessive diarrhea, and changes in stool shape. However, probiotics should not be supplemented on a regular basis. In cases of intestinal problems, probiotic supplementation is usually only needed for one to two weeks. Common adverse reactions to probiotics, include diarrhea, bloating, allergies, and intestinal dysfunction. Additionally, there are some risks associated with the administration of probiotics and patients need to be guided by a specialist.