After a gastroscopic biopsy, or colonoscopy to remove polyps you need to start eating 1 to 2 days after the examination, i.e., fasting for 1 to 2 days. Also early resumption of diet requires gastrointestinal protection. Gastroscopic biopsy generally refers to the use of endoscopy for local sampling of gastrointestinal tissues, which may cause some damage to the mucosa and tissues of the gastrointestinal tract. Meanwhile, colonoscopy to remove polyps also belongs to the scope of small surgical operations, so both examination programs will cause damage to the gastrointestinal tract digestive system and function. People who choose gastroscopic biopsy or colonoscopy to remove polyps should try to choose warm, cool and easy-to-digest liquid or semi-liquid food in the early stage of eating, and then gradually transition to a normal diet, which can not only reduce the pressure on the gastrointestinal digestive tract, but also avoid bleeding or inflammation of surgical wounds. Gastrointestinal endoscopy operators should follow the doctor’s advice to properly protect the gastrointestinal tract.