The medical definition of constipation is variable, but is usually considered to be two or fewer bowel movements per week. The definition also includes having excessive difficulty with defecation. Even the stress associated with travel or hospital stays can cause short-term constipation. One of the most common causes of constipation, however, is a diet low in fiber. Fruits, vegetables and whole grain foods are the best sources of fiber in the foods we normally eat.
Many people find that adding a fiber supplement is easier than making overall changes in their diet.
Another common cause of constipation, especially with increased difficulty in having bowel movements, is dehydration. This not only decreases the amount of feces for a bowel movement, but also can cause hardened feces that are painful to pass and may even cause fissures or tears of the anus. You can test this possibility and treat it at the same time by drinking at least eight large glasses of water or other fluids daily. Increased fluid and natural fiber in the diet take care of most cases of constipation. Daily prune juice or mineral oil may help as well.