Key takeaways

  • Constipation includes hard stools, straining or incomplete emptying, not only infrequent bowel movements.
  • Increase fibre gradually and consider fluids, movement, routine and medicines that may contribute.
  • Bleeding, constant pain, vomiting, fever, weight loss or inability to pass gas requires medical advice.

Constipation can mean having fewer bowel movements than usual, passing hard or dry stools, straining, or feeling that the bowel has not emptied completely. Frequency differs between people, so a change from your normal pattern and the difficulty of passing stool matter as much as a number.

Short episodes are common and may follow travel, a change in routine, illness or a change in eating. Persistent constipation can have several causes and should not always be treated as a simple lack of fibre.

Why constipation happens

Stool may move too slowly through the colon, the muscles used for a bowel movement may not coordinate well, or another health condition may affect digestion. Common contributors include low fibre intake, not drinking enough, limited activity, ignoring the urge to go, pregnancy, ageing and changes in routine.

Some medicines and supplements can contribute, including certain pain medicines, iron supplements, some antacids and some medicines used for depression, seizures or blood pressure. Do not stop a prescribed medicine without speaking with a healthcare professional.

Increase fibre gradually

Whole grains, oats, beans, lentils, vegetables, fruit, nuts and seeds provide fibre. Add it over days or weeks rather than making a sudden large change, which may initially worsen gas and bloating. A practical first step could be adding fruit to breakfast or beans to one meal.

Some people with specific digestive conditions need different advice. More fibre is not automatically the answer for everyone, especially when severe pain, vomiting or a possible blockage is present.

Pair fibre with fluid

Fluid helps fibre do its job and can make stool easier to pass. Water is a reliable everyday choice, while soups, milk and other drinks also contribute. Individual fluid needs vary, and people with heart or kidney conditions may have been advised to limit fluids.

Build a regular toilet opportunity

The colon often becomes more active after eating. Set aside unhurried time after breakfast or another regular meal. Go when you feel the urge rather than repeatedly delaying it. Placing the feet on a low stool may create a more comfortable position; avoid prolonged straining.

Use movement as support

Regular physical activity may help. This does not need to be intense—a walk, gentle cycling or normal movement through the day can be a realistic starting point.

What about laxatives?

Different laxatives work in different ways, and the right option depends on the cause, other medicines and your health. A pharmacist or clinician can help you choose and explain how long to use it. If you rely on laxatives regularly or they stop working, arrange a review rather than continually increasing the dose.

When to see a doctor

Seek prompt medical advice for constipation with rectal bleeding, blood in the stool, constant abdominal pain, vomiting, fever, inability to pass gas or unintentional weight loss. Make a routine appointment if self-care does not help, the change persists, or there is a family history of colorectal cancer.

Sources and further reading

NIDDK: Symptoms and causes of constipation and NIDDK: Treatment for constipation.

This article is for general education and does not replace assessment by a healthcare professional.