Diarrhea cannot be used for weight loss, and diarrhea has no effect on weight loss. Often called diarrhea, most are congestion and edema of the intestinal mucosa, increased vascular permeability, causing a decrease in blood circulation resulting in increased diarrhea, but only a decrease in fluid in the body. For obesity, most of them are fat accumulation leading to obesity caused by fat. For diarrhea can not reduce the consumption of fat in the body, but only for the body’s water has a sufficient reduction. Therefore, the purpose of weight loss is to consume fat, and diarrhea is not able to achieve the effect of fat consumption, so diarrhea can not play any weight loss effect. For patients with long-term hunger or diarrhea, patients with wasting diseases can play the role of fat consumption and can play a weight loss effect, so it is not meaningful to rely solely on diarrhea to lose weight.