PRX Pharmacy

Constipation

Constipation means finding it hard to poo, or not going as often as usual. It is very common and usually short-lived, and simple changes to diet and habits often fix it. Everyone's normal is different, but many people go between three times a day and three times a week.

Usually
Short-term and easy to treat
First steps
Fibre, fluids, movement
Laxatives
Best used short-term

Common symptoms

  • Going to the toilet less often than usual (for example fewer than three times a week)
  • Hard, dry or lumpy poo
  • Straining, or pain when passing poo
  • Feeling that you have not fully emptied your bowel
  • A bloated or uncomfortable tummy

Common causes

  • Not enough fibre or fluids
  • Not being very active
  • Ignoring the urge to go, or changes to your routine and travel
  • Some medicines, including strong painkillers (such as codeine and morphine), some antacids and iron tablets — ask us if you think a medicine is the cause
  • Pregnancy, and some health conditions
  • Stress and anxiety

What you can do yourself

  • Gradually eat more fibre — fruit, vegetables, wholegrain bread, cereals, beans and lentils.
  • Drink plenty of fluids, mostly water.
  • Be active every day if you can, such as walking.
  • Go when you feel the urge, and give yourself time. A small footstool to raise your knees can help.
  • Do not strain, which can cause piles or small tears.

Laxatives

If diet and lifestyle changes are not enough, a pharmacist can recommend a laxative. There are different types — some add bulk to the stool, some soften it and some stimulate the bowel — and the right one depends on you. They are usually best for short-term use, so tell us if you need them for more than a week or two. Always ask about laxatives for children or during pregnancy.

How PRX Pharmacy can help

We can recommend a suitable laxative, check it will not interact with your other medicines, and advise on diet and habits.

When to get medical help

Call 999 or go to A&E if:

  • You have severe, constant tummy pain, especially with vomiting, a swollen tummy, and being unable to pass wind or poo
  • You are vomiting bile or blood

Contact your GP practice or call 111 the same day if:

  • There is blood in your poo, or your poo is black and tarry
  • You have unexplained weight loss
  • It is a new, unexplained change in your bowel habit that has lasted more than 3 weeks, especially if you are over 40
  • Constipation has not improved after a week or two of the steps above and laxatives
  • You are alternating between constipation and diarrhoea, or have ongoing tummy pain or bloating
  • It is a baby, or a child who is not improving
  • You suspect a medicine is causing it

If you are ever worried and unsure, ask us or call 111. Trust your instincts — it is always better to ask.

This guide is general information written by the PRX Pharmacy team. It does not replace advice from a pharmacist or doctor who knows your medical history.

Last updated 24 September 2026. Clinically reviewed by Milan Patel, Pharmacist on 24 September 2026.

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