Common causes of constipation include:

	Not enough fiber in the diet
	Not drinking enough fluid, especially water
	Lack of exercise
	Use of certain medicine, such as those prescribed for iron deficiency, high blood pressure, high cholesterol, depression or anxiety, pain, duodenal ulcer or cough.
	Certain diseases, such as mutiple sclerosis or lupus
	Changes in lifestyle or routine, such as pregnancy, child birth, travel or stress
	Surgery
	Aging
	Ignoring the urge to have a bowel movement