Drinking electrolytes for a proctoscopy, primarily for diarrhea and bowel cleansing, can improve the accuracy of the bowel exam and diagnosis of the condition. The key step before the proctoscopy is to prepare the bowel and remove clean intestinal contents. Therefore, before the proctoscopy, the examining physician will let the patient drink 2000ml of electrolyte water in advance to promote excretion and clean the intestinal tract. After the intestinal contents are cleared, the intestinal mucosa is fully exposed under the proctoscope, which is easy for the physician to observe, and the examination results are more accurate for the diagnosis of the condition. After drinking a large amount of electrolyte water at one time, some adverse reactions may occur, such as bloating and vomiting, which can be relieved by proper walking. Before proctoscopy, it is recommended that patients communicate in detail with their doctors to understand the precautions for proctoscopy, such as only eating fluids and a light diet the day before proctoscopy, and prepare for the examination in advance.