What causes constipation?

Anatori Sealife Comments 0 11th April 2019
Common Causes of Constipation. About bowel movement

Understanding the common causes of constipation helps know how the colon (large intestine) works. The colon absorbs water as food moves through it while forming waste products or faeces. Muscle contractions in the colon push the stool toward the rectum. When the faecal matter reaches the rectum, It hardens due to almost complete water absorption. The solid and dry stools of constipation occur when the colon absorbs too much water. That happens because of slow or sluggish colon muscle contractions, causing the content to move through the colon too slowly.

Common causes of constipation

  • Not enough fibre in the diet
  • Not enough liquids
  • Lack of exercise
  • Low-fat diets
  • Medications
  • Irritable bowel syndrome
  • Changes in life or routine such as pregnancy, older age, and travel
  • Abuse of laxatives
  • Ignoring the urge to have a bowel movement
  • Specific diseases such as multiple sclerosis and lupus

Low fibre diet

The most common cause of constipation is a diet low in fibre found in vegetables, fruits, and whole grains and high in fats found in cheese, eggs, and meats. People who eat plenty of high-fibre foods are less likely to become constipated. Fibre – soluble and insoluble – is the part of fruits, vegetables, and grains that the body cannot digest. Soluble fibre dissolves easily in water and takes on a soft, gel-like texture in the intestines. Insoluble fibre passes almost unchanged through the intestines. The bulk and smooth fibre help prevent hard, dry stools that are difficult to pass. A low-fibre diet also plays a crucial role in constipation among older adults. They often lack interest in eating and may choose fast foods low in fibre. Besides, losing teeth may force more senior people to eat soft foods processed and low in fibre.

Not enough liquids

Liquids like water, preferably filtered or bottled, and juice adds fluid to the colon and bulk to stools, making bowel movements softer and easier to pass. People with constipation should drink enough of these liquids every day, about eight 8-ounce glasses. Other beverages like coffee and soft drinks that contain caffeine have a dehydrating effect, and we should avoid it.

What causes constipation? – Lack of exercise

Lack of exercise can lead to constipation. For example, constipation often occurs after an accident or an illness when one must stay in bed and not exercise.


Some factors can slow the passage of bowel movements:

  • Pain medications,
  • antacids that contain aluminium,
  • antispasmodics,
  • anti-depressants,
  • iron supplements,
  • diuretics,
  • anticonvulsants for epilepsy.

Irritable bowel syndrome (IBS)

Some people with IBS have spasms in the colon that affect bowel movements. Constipation and diarrhoea often alternate, and abdominal cramping, flatulence and bloating are other common complaints. Although IBS can produce lifelong symptoms, it is not a life-threatening condition. It often worsens with stress.

Changes in life or routine

During pregnancy, women may constipate because of hormonal changes or because the heavy uterus compresses the intestine. Ageing may also affect bowel regularity because a slower metabolism results in less intestinal activity and muscle tone. Besides, people often become constipated when travelling because of disrupted regular diet and daily routines.

Abuse of laxatives

Long-term use of laxatives is not usually necessary and can be habit-forming. The colon begins to rely on laxatives to bring on bowel movements. Over time, laxatives can damage nerve cells in the colon and interfere with the colon’s natural ability to contract. For the same reason, regular use of enemas can also lead to a loss of normal bowel function.

Ignoring the urge to have a bowel movement

People who ignore the urge to have a bowel movement may eventually stop feeling the urge, leading to constipation. Some people delay having a bowel movement because they do not want to use toilets outside the home. Others ignore the urge because of emotional stress or because they are too busy. Children may postpone having a bowel movement because of stressful toilet training or do not want to interrupt their play.


  • Eat high fibre foods such as fresh fruits, raw green leafy vegetables, and brown rice daily.  Also, a diet rich in these foods promotes peristalsis (the intestine contractions that propel faecal matter to the anus for evacuation).  Besides, this fibre in these foods attracts water to form a gelatinous mass that keeps faeces soft, bulky and easy to pass.
  • Also, eat asparagus, beans, Brussels sprouts, cabbage, carrots, garlic, sweet potatoes, whole grains and pulses as these are high soluble fibre.
  • Drink at least eight 8oz glasses of water every day, whether you are thirsty or not.
  • Avoid foods that stimulate mucous membrane secretion, such as dairy products and spicy foods.
  • Also, avoid fizzy drinks, red meat, processed foods, salt, coffee, alcohol and sugar – these foods are difficult to digest and have little or no fibre.
  • If constipated, eat prunes or figs because these are excellent natural laxatives.
  • Get some exercise because physical activity speeds the movement of waste through the intestines.  A twenty-minute walk can often relieve constipation.  Regular exercise is also important for preventing constipation in the first place.
  • Try going to the toilet simultaneously each day, even if the urge does not exist, and relax.  Stress tightens the muscles and can cause constipation.  Never repress the urge to defecate.
How to treat constipation

Bibliography: Murray M, Pizzorno P Encylopedia of Natural Medicine. Prima Health 2nd Edition 1998 Balch J Balch P Prescription for Nutritional Healing. Avery 2nd Edition 1997 Golan R.  Optimal Wellness. Ballantine Books 1995