Taking probiotics does not cause constipation, but instead has the effect of relieving constipation. Probiotics are beneficial bacteria in the intestinal tract, and their main function is to regulate the imbalance of intestinal flora. Probiotics have a two-way regulatory effect on intestinal function. Supplementing probiotics when constipation occurs can promote intestinal peristalsis and improve constipation. When diarrhea occurs, supplementation of probiotics can improve intestinal function, so that the intestinal tract can better absorb food nutrients, and at the same time, improve intestinal immunity, so as to alleviate the role of diarrhea. Probiotics supplementation can also help improve the acidic environment in the intestines and inhibit the overgrowth of harmful bacteria. However, some people have constipation, is due to intestinal tumors, intestinal obstruction and other factors, these people supplement probiotics, for constipation improvement effect is limited, and should be directed to the treatment of the disease, constipation can be relieved.