Drinking electrolyte dispersion is mostly used to prepare for colonoscopy and, in a few cases, to treat functional constipation. Patients used to treat constipation generally only need to resolve the difficulty in passing stool and do not need to have a clean bowel movement. The number of bowel movements varies from person to person, but usually the examination can be performed after passing clear stools. Usually, the first bowel movement is within 1-2 hours after drinking electrolytes, followed by a gradual discharge of unformed stool, thin watery stool, watery stool, clear water or yellowish watery stool. This process usually takes 4-6 hours, and may take longer for patients with severe constipation, but the number of bowel movements should be at least 4. Electrolyte dispersion should be taken under the guidance of a physician. 1-2 days before the colonoscopy, you should eat light, less crumbly food and try to avoid fruits and vegetables with seeds and vegetables that are difficult to drain, such as leeks and spinach, so as not to obscure the view under the mirror. After taking it, you can gently rub your stomach and walk back and forth to promote gastrointestinal motility. Try not to lie down and rest after drinking, so as not to weaken the gastrointestinal peristalsis and cause poor defecation and more residual stool in the intestinal tract, which may affect the colonoscopic observation.