Why Am I Always Constipated?

Always constipated and nothing seems to work? Discover the real, often ignored causes of chronic constipation, from poor gut motility to fibre mistakes and what actually fixes it, backed by science.

It's not just about eating more vegetables. Your gut is sending you a message; here's how to finally understand it.

16% of adults worldwide experience chronic constipation

33% of adults over 60 are affected regularly

2×more common in women than men

You sit. You wait. Nothing happens. And this isn't the first time this week. If you're googling "why am I always constipated," you're in the right place, and you're definitely not alone.

Chronic constipation affects hundreds of millions of people globally, yet most of us are too embarrassed to talk about it. The result? We suffer in silence, reaching for laxatives that only mask the problem. Let's fix that, starting with understanding why it keeps happening.

🚫 You're Not Drinking Enough Water (And You Probably Know It)

Your colon absorbs water from digested food to form stool. When you're dehydrated, your colon pulls even more water from that waste, leaving it dry, hard, and very difficult to pass. Research published in the European Journal of Clinical Nutrition confirms that increasing daily water intake significantly improves stool frequency and consistency.

Quick check: Is your urine pale yellow? If it's dark or tea-coloured, you're dehydrated. Aim for 2–3 litres of water daily, and more if you're active or in a warm climate like India.

Low fibre intake, the most common cause of chronic constipation

Fibre adds bulk to stool and feeds the beneficial bacteria in your gut. Most adults eat only 10–15g of fibre daily, far below the recommended 25–38g. There are two types to know: soluble fibre (oats, apples, flaxseed) softens stool by absorbing water, while insoluble fibre (whole grains, vegetables) adds bulk and speeds movement through the intestines.

Chronic Stress Is Literally Stopping You Up

Your gut and brain are in constant conversation through the gut-brain axis, a two-way communication network connecting your central nervous system to your enteric nervous system (the "second brain" in your gut). When you're stressed, your body activates the fight-or-flight response, diverting blood flow away from digestion.

A landmark study in Gthe ut journal found that psychological stress slows colonic transit time, meaning food moves more slowly through your large intestine, giving it more time to harden. If your constipation gets worse during exams, work deadlines, or emotional upsets, stress is likely a major player.

📖 Related Read: How Stress Destroys Your Gut Health (And What to Do About It)

Sedentary lifestyle and slow gut motility

Physical activity physically stimulates the muscles of your intestines. Studies show people who exercise regularly have significantly better bowel function than sedentary individuals. Even a 20-minute walk after meals can measurably speed up intestinal transit time. If you sit at a desk all day and don't move much, your gut is likely slow too.

💊 Medications That Secretly Cause Constipation

This is one of the most overlooked chronic constipation causes. A wide range of common medications slow bowel movements as a side effect:

• Opioid painkillers (codeine, tramadol): slow gut contractions dramatically

• Iron supplements: a common culprit, especially in pregnancy

• Antacids containing aluminium or calcium

• Antidepressants (tricyclics especially)

• Antihistamines (allergy medications)

• Blood pressure medications (calcium channel blockers)

  
  

If you've recently started a new medication and notice constipation, speak to your doctor. Do not stop medication without medical guidance.

🦠 Your Gut Microbiome Might Be Out of Balance

Your gut houses trillions of bacteria, fungi, and other microorganisms, collectively called the gut microbiome. Research from Nature Reviews Gastroenterology & Hepatology shows that people with chronic constipation have measurably different microbiome compositions, with fewer beneficial bacteria like Bifidobacterium and Lactobacillus and higher levels of harmful strains.

These bacteria produce short-chain fatty acids (SCFAs) that directly stimulate colon movement. When beneficial bacteria are depleted, from antibiotics, poor diet, or stress peristalsis (the wave-like muscular movement that pushes stool forward) can slow significantly.

📖 Related Read: What Your Gut Bacteria Are Trying to Tell You About Your Health

Food intolerances and digestive slowdown

Undiagnosed lactose intolerance, gluten sensitivity, or FODMAP sensitivity can contribute to constipation (and sometimes alternating constipation and diarrhoea, a hallmark of IBS). If you notice your constipation is worse after dairy, bread, or certain fruits, an elimination diet or food sensitivity test may reveal.

🧬 Hormones Play a Bigger Role Than You Think

This is why constipation is twice as common in women. Progesterone relaxes smooth muscle, including the muscles lining the intestines, which slows gut movement. Constipation is extremely common in the second half of the menstrual cycle, during pregnancy, and around perimenopause.

Thyroid disorders also matter significantly. Hypothyroidism (underactive thyroid) is a well-documented cause of chronic constipation. The thyroid regulates metabolism, and a slow metabolism means slow everything, including digestion. A 2019 study in the Thyroid journal found constipation was present in up to 48% of hypothyroid patients.

🚽 You're Ignoring the Urge to Go

This sounds simple, but it's surprisingly common, especially in busy, always-on lifestyles. When you repeatedly suppress the urge to have a bowel movement (because you're at work, travelling, or just don't want to use a public toilet), the rectum adapts. Over time, it becomes less sensitive to the signals that normally trigger the urge, leading to a cycle of retained stool that becomes harder and harder to pass. This is called rectal hyposensitivity.

Pelvic floor dysfunction is often missed in women

For some people, particularly women who've had children, the pelvic floor muscles don't relax properly during defecation. Instead, they tighten, physically blocking stool from exiting. This condition, called dyssynergic defecation or anismus, is estimated to affect 25–50% of people with chronic constipation. It doesn't respond well to fibre or la;xatives, it requires pelvic floor physiotherapy.

🍫 Ultra-Processed Foods and the Gut-Wrecking Diet

Ultra-processed foods (biscuits, packaged snacks, instant noodles, fast food) are typically stripped of fibre, loaded with refined starches, and high in sodium. They slow gastric emptying, feed harmful gut bacteria, and provide nothing to bulk up stool. A large cohort study in The Lancet found that high consumption of ultra-processed foods was independently associated with increased constipation risk.

The rule of thumb: If the food has more than 5 ingredients or ingredients you can't pronounce, it's probably not helping your bowels.

⚕️ When to See a Doctor About Chronic Constipation

Occasional constipation is normal. But if you're experiencing fewer than 3 bowel movements per week for more than 3 months, or if constipation is accompanied by:

• Blood in stool or on toilet paper

• Unexplained weight loss

• Severe abdominal pain

• Alternating diarrhoea and constipation

• Feeling like bowel movements are incomplete

  
  

...please see a gastroenterologist. These could be signs of IBS, IBD, colorectal cancer, or other conditions needing medical attention.

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