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 feces will become.A person who poops fewer than 3 times per week may have constipation.Sometimes, constipation results from a blockage in the large intestine. In this case, a person will need urgent medical attention. At other times, it may simply...