Looking for a Constipation Specialist in Gurgaon ? Constipation occurs when a person has difficulty emptying the large bowel. Constipation can happen for many reasons, such as when stool passes through the colon too slowly. The slower the food moves through the digestive tract, the more water the colon will absorb and the harder the faeces will become. A person who poops fewer than 3 times per week may have constipation.