🚫 Constipation
Understanding, treating, and preventing constipation
Last reviewed: February 2026
📖 What is Constipation?
Constipation is a common digestive complaint characterized by infrequent bowel movements, difficulty passing stool, or a sensation of incomplete evacuation. While bowel habits vary among individuals, constipation is generally defined as having fewer than three bowel movements per week.
Rome IV Criteria for Chronic Constipation
Must include two or more of the following for at least 3 months:
- Straining during more than 25% of bowel movements
- Lumpy or hard stools more than 25% of the time
- Sensation of incomplete evacuation more than 25% of the time
- Sensation of blockage more than 25% of the time
- Manual maneuvers to facilitate defecation more than 25% of the time
- Fewer than 3 spontaneous bowel movements per week
Bristol Stool Chart
A visual scale used to classify stool consistency:
| Type | Description | Indicates |
|---|---|---|
| Type 1 | Separate hard lumps (like nuts) | Severe constipation |
| Type 2 | Sausage-shaped but lumpy | Mild constipation |
| Type 3 | Sausage with cracks on surface | Normal |
| Type 4 | Smooth, soft sausage or snake | Ideal normal |
| Type 5 | Soft blobs with clear edges | Lacking fiber |
| Type 6 | Fluffy pieces with ragged edges | Mild diarrhea |
| Type 7 | Watery, no solid pieces | Diarrhea |
🔬 Types & Causes
Primary (Functional) Constipation
No underlying disease causing the problem. Includes:
- Normal-transit constipation: Most common type; stool moves at normal rate but patient still feels constipated
- Slow-transit constipation: Reduced colonic motility; stool moves slowly through colon
- Outlet dysfunction (dyssynergic defecation): Difficulty coordinating muscles during defecation
Secondary Constipation
Caused by an underlying condition or factor:
Lifestyle Factors
- Low fiber intake
- Inadequate fluid intake
- Sedentary lifestyle
- Ignoring the urge to defecate
- Travel or change in routine
Medications
| Drug Class | Examples |
|---|---|
| Opioid pain medications | Morphine, codeine, tramadol, oxycodone |
| Anticholinergics | Antihistamines, antidepressants |
| Calcium channel blockers | Verapamil, diltiazem |
| Iron supplements | Ferrous sulfate |
| Antacids | Aluminum-containing antacids |
| Antispasmodics | Dicyclomine |
| Diuretics | Various |
Medical Conditions
- Endocrine: Hypothyroidism, diabetes, hypercalcemia
- Neurological: Parkinson's disease, multiple sclerosis, spinal cord injury
- GI disorders: IBS-C, Crohn's stricture, colon cancer
- Pelvic floor disorders: Rectocele, pelvic floor dysfunction
- Pregnancy: Hormonal changes and pressure on bowel
🚨 When to See a Doctor
- Blood in stool or rectal bleeding
- Unexplained weight loss
- New constipation after age 50
- Severe abdominal pain
- Alternating constipation and diarrhea
- Thin, pencil-like stools
- Constipation not improving with treatment
- Family history of colon cancer
- Fever with constipation
- Complete inability to pass stool or gas (may indicate obstruction)
🔍 Diagnosis
Initial Evaluation
- Detailed history of bowel habits, diet, medications
- Physical examination including abdominal and rectal exam
- Blood tests: thyroid function, calcium, glucose
When Further Testing is Needed
- Colonoscopy: If red flags present or age-appropriate screening due
- Anorectal manometry: Measures muscle function during defecation
- Balloon expulsion test: Tests ability to expel a balloon from rectum
- Defecography: X-ray or MRI imaging during defecation
- Colonic transit study: Tracks markers through colon to assess transit time
🥗 Lifestyle & Diet Management
Fiber
Fiber is the cornerstone of constipation prevention and treatment:
- Goal: 25-35 grams of fiber per day
- Increase gradually: Sudden increases cause bloating and gas
- Types: Both soluble and insoluble fiber are beneficial
| High-Fiber Foods | Fiber per Serving |
|---|---|
| Rajma (kidney beans), 1 cup cooked | ~11g |
| Chana (chickpeas), 1 cup cooked | ~10g |
| Pear, medium with skin | ~5.5g |
| Apple, medium with skin | ~4.5g |
| Oats, 1 cup cooked | ~4g |
| Broccoli, 1 cup cooked | ~5g |
| Whole wheat roti, 1 medium | ~3-4g |
| Psyllium husk (isabgol), 1 tbsp | ~5g |
Hydration
- Drink at least 8 glasses (2 liters) of water daily
- Fiber without adequate water can worsen constipation
- Warm water in the morning may stimulate bowel movement
- Limit caffeine and alcohol (can be dehydrating)
Exercise
- Regular physical activity stimulates bowel motility
- Aim for 30 minutes of moderate exercise most days
- Walking, swimming, yoga are all beneficial
- Even gentle movement helps if mobility is limited
Bowel Habits
- Do not ignore the urge: Respond promptly when you feel the need
- Establish a routine: Same time each day, preferably after a meal
- Take your time: Allow 10-15 minutes without rushing
- Proper positioning: Feet elevated on a stool (squatting position)
- Relax: Do not strain excessively
💊 Medications & Treatments
Fiber Supplements
- Psyllium (Metamucil, Isabgol): Soluble fiber; take with plenty of water
- Methylcellulose (Citrucel): Less bloating than psyllium
- Wheat dextrin (Benefiber): Dissolves completely in beverages
Osmotic Laxatives
Draw water into the intestines to soften stool:
- Polyethylene glycol (MiraLAX, Laxopeg): Very effective, well-tolerated; safe for long-term use
- Lactulose: Synthetic sugar; may cause bloating
- Magnesium-based: Milk of magnesia, magnesium citrate
Stimulant Laxatives
Stimulate intestinal muscles to contract:
- Bisacodyl (Dulcolax): Oral or suppository
- Senna (Senokot): Natural plant-based
- Use: For occasional use; avoid daily long-term use
Stool Softeners
- Docusate (Colace): Adds moisture to stool; mild effect
- Best for: Preventing straining after surgery or with hemorrhoids
Prescription Medications
| Medication | Mechanism | For |
|---|---|---|
| Linaclotide (Linzess) | Increases intestinal fluid secretion | IBS-C, chronic constipation |
| Lubiprostone (Amitiza) | Chloride channel activator | Chronic constipation, IBS-C |
| Plecanatide (Trulance) | Similar to linaclotide | Chronic constipation, IBS-C |
| Prucalopride (Motegrity) | Prokinetic; stimulates motility | Chronic constipation |
| Methylnaltrexone | Opioid receptor blocker (peripheral) | Opioid-induced constipation |
Biofeedback
For dyssynergic defecation (outlet dysfunction). Teaches proper coordination of pelvic floor muscles during defecation. Success rates of 70-80%. Requires specialized therapist.
Enemas and Suppositories
- Glycerin suppositories: Mild, safe
- Bisacodyl suppositories: Stimulant effect
- Saline enemas: For severe or impacted constipation
🏠 Home Remedies
- Warm water with lemon: First thing in morning
- Prunes or prune juice: Natural sorbitol content aids bowel movement
- Isabgol (psyllium husk): 1-2 teaspoons in water or milk at bedtime
- Triphala: Traditional Ayurvedic remedy; gentle bowel regulator
- Castor oil: Traditional remedy (occasional use only)
- Aloe vera juice: May help some people
- Papaya: Contains enzymes that aid digestion
- Kiwifruit: Studies show benefit for constipation
- Flaxseed: Ground flaxseed provides fiber and healthy fats
❓ Frequently Asked Questions
"Normal" varies widely. Anywhere from 3 times per day to 3 times per week can be normal if stools are soft and easy to pass. What matters more than frequency is consistency and comfort.
Some laxatives are safe for regular use. Fiber supplements and osmotic laxatives like polyethylene glycol can be used long-term under medical guidance. Stimulant laxatives should generally be used occasionally, not daily, to avoid dependency.
Chronic constipation can lead to hemorrhoids (from straining), anal fissures, fecal impaction, rectal prolapse, and diverticular disease. It can also affect quality of life significantly. Addressing constipation early prevents these complications.
Hormonal changes (progesterone) slow gut motility. The growing uterus puts pressure on the intestines. Iron supplements often prescribed in pregnancy also contribute. Safe treatments include fiber, fluids, and gentle laxatives like polyethylene glycol if needed.