Taking certain prescription medications
Not drinking enough liquids
A lack of fiber
Irritable bowel syndrome (IBS)
Some forms of irritable bowel syndrome (IBS) cause constipation.
Ignoring the urge to have a bowel movement
Changes in lifestyle, such as pregnancy or old age
Issues related to intestinal function
Laxative abuse
Blockages in the colon or rectum
This can be caused by anal fissures, bowel obstructions, or colon cancer.
Health conditions that affect hormones
This includes diabetes.