If you hold back too often, it can cause constipation. Why? Most people have experienced the feeling of holding back a bowel movement. For example, during a meeting, while driving, etc. When the human body has the feeling of feces, if you do not go to the toilet, you will consciously contract the external anal sphincter to stop feces discharge, after a few minutes, feces can return to the sigmoid colon or descending colon, and the feeling of feces will disappear temporarily. If for a long time, often forcibly, not to defecate, can make the feeling of defecation weaken, thus causing constipation. Therefore, I recommend that you have a bowel movement at the right time. In other words, if you want to defecate, go to defecate as early as possible.