Constipation involves unusually infrequent, irregular bowel movements that are dry, hard, and difficult to pass. Generally doctors consider fewer than three movements a week constipation, but normal bowel habits vary greatly from person to person.
Most people defecate once a day.
Some, however, regularly do so only about three times a week, while others have as many as three bowel movements a day. It is the change in bowel habits that indicates constipation. Usually constipation is nothing more than a minor problem, but it can be a symptom of something more serious. If constipation persists for more than three days, or if you have blood in your stool, see your doctor. Common causes The large intestine removes the water from wastes before they are expelled through the anus.