(HealthDay News) - Constipation often is defined as producing fewer than three bowel movements in a week. Other symptoms may include producing small, hard stools; and significant straining during bowel movements.

The University of Michigan Health System lists these common causes of constipation:

• Insufficient fiber in the diet.
• Dehydration.
• Not getting enough exercise.
• Lifestyle factors, including taking certain medications, pregnancy, travel or aging.
• Not acting on the urge to produce a bowel movement.
• Having conditions such as irritable bowel syndrome, a blockage of the colon or rectum, or certain systemic diseases.