Constipation
Constipation is a symptom, not a disease. Constipation means the bowel does not move easily or regularly. This may mean having a bowel movement fewer than every three days and the stools (bowel motion) may be hard and difficult to pass.
Some people who are constipated find it painful to have a bowel movement and often experience straining, bloating, the sensation of a full bowel or a sense that the bowels are not empty. Some people think they are constipated if they do not have a bowel movement every day. However, normal bowel movements may vary from three times a day to once every three days depending on the person.
Common causes of constipation are:
irregular meals and not enough fiber in the diet
lack of physical activity (especially in the elderly)
medications e.g. pain medications (especially narcotics), antacids that contain aluminum and calcium, some blood pressure medications (calcium channel blockers), anti-Parkinson drugs, antispasmodics, antidepressants, iron supplements, diuretics, anticonvulsants
irritable bowel syndrome
changes in life or routine such as pregnancy, aging, and traveling
abuse of laxatives
ignoring the urge to have a bowel movement
dehydration
specific diseases or conditions, such as stroke (most common)
problems with the colon and rectum
problems with intestinal function (chronic idiopathic constipation)