Search
Close this search box.

There are many possible causes of chronic constipation. But in most cases, no cause can be identified. Such constipation may be said to be “idiopathic” or “functional.” That means there is a problem with the way the body is working.

Constipation can be made worse by one or more of the following:

  • poor general health,
  • inactivity,
  • use of certain medications,
  • laxative abuse,
  • depression or psychological distress,
  • low fiber diet, or
  • certain medical diseases.

Often, more than one factor contributes to the constipation. Here is a list of common examples.

Other Causes of Constipation

Factor Examples
Functional/idiopathic Constipation with irritable bowel syndrome (IBS), idiopathic (unexplained) normal transit constipation, slow-transit constipation, pelvic floor dysfunction (obstructive)
Congenital (present at birth) Hirschsprung’s disease
Structural Stricture, rectocele, intestinal pseudo-obstruction
Dietary Inadequate fiber intake, inadequate caloric intake
Environmental Compromised mobility, inadequate toileting facilities
Myopathic
(abnormality of the muscles)
Systemic sclerosis
Neurogenic (arising from
the nervous system)
Multiple sclerosis, Parkinson’s disease, spinal cord injury
Endocrine/metabolic Diabetes mellitus, hyperparathyroidism, hypothyroidism, pregnancy, scleroderma
Pharmacologic (Medications) * Analgesics, anticholinergics, antidepressants, antihypertensives, antiparkinsonian agents, diuretics, possibly long-term laxative use, narcotics

* Common Medicines That May Cause Constipation

  • Antacids that contain aluminum (usually aluminum hydroxide)
  • Antidepressants
  • Antidiarrheal agents
  • Antiparkinson drugs
  • Antispasmodics
  • Diuretics (“water pills”) that cause potassium loss
  • Iron supplements
  • Opiate-type pain medications
  • Medications to treat high blood pressure
    • Calcium channel blockers
    • Clonidine
  • Nasal decongestants and antihistamines
  • Nonsteroidal anti-inflammatory drugs (NSAIDs)

Learn more about Causes of Constipation 

Adapted from IFFGD Publication: Constipation Overview by Darren Brenner , M.D., AGAF, FACG, Associate Professor and Director of the Neurogastromotility Program, Division of Gastroenterology, Northwestern University Feinberg School of Medicine, Chicago, IL

Share this page
Topics of this article
Was this article helpful?

IFFGD is a nonprofit education and research organization. Our mission is to inform, assist, and support people affected by gastrointestinal disorders.

Our original content is authored specifically for IFFGD readers, in response to your questions and concerns.

If you found this article helpful, please consider supporting IFFGD with a small tax-deductible donation.

Related Information
Treatment of Constipation

Effective treatment for constipation depends upon an accurate diagnosis. Unfortunately, no specific symptom(s) can be used to differentiate one cause from another, and symptoms sometimes

Read More »
Personal Stories
Treatment of Constipation

Effective treatment for constipation depends upon an accurate diagnosis. Unfortunately, no specific symptom(s) can be used to differentiate one cause from another, and symptoms sometimes

Read More »
Skip to content