It takes 4-5 days before you can have a normal diet after a colonoscopy biopsy, and this varies from person to person. If the corresponding tissue is taken for biopsy during the examination, in this case there will be wound trauma in the intestine, in order to prevent the food residue from stimulating the intestinal tract, avoiding the formation of blood in the stool or other undesirable complications, so the first to be mainly fluids, can not eat too much residue of food. Usually 2-3 days of non-scummy liquid food can be resumed semi-liquid food, eat pasta, noodles and other easily digestible, usually in 4-5 days after the return to normal diet. If you have abdominal pain, diarrhea, bloody stools and other symptoms after this colonoscopy, it is recommended to go to the hospital in time to see a doctor, under the guidance of the doctor to give appropriate treatment.