Bowel cleansing can be done with just electrolyte water also known as Compound Polyethylene Glycol Electrolyte Bulk, which is a commonly used clinical medication. PEG Electrolyte is an osmotic laxative and can be used in small doses to assist with daily laxation, and in larger doses mainly for bowel cleansing prior to surgery or bowel exams. When the electrolytes go back into the bowel, it will increase the fluid in the bowel and soften the stool, thus achieving the effect of laxative and bowel cleansing. The cleansing effect is more effective and has fewer side effects. If it is not effective, it is necessary to consult a doctor or add an enema to the treatment. For better results, dimethylsilicone oil or xylomethicone oil can be taken orally for defoaming treatment, which can make the endoscopic field of view clearer and the examination effect better. This drug should be contraindicated in cases of gastrointestinal obstruction, intestinal perforation, gastrointestinal bleeding, etc. It should also be used with caution in severe ulcerative colitis. Common adverse reactions include abdominal pain, diarrhea, and gastrointestinal cramps, which should be noted. There are many ways to cleanse the bowels, should be carried out under the guidance of a doctor, to avoid unauthorized use of drugs to produce adverse conditions.