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Constipation

This information was published by Bupa's health information team and is based on reputable sources of medical evidence. It has been peer reviewed by Bupa doctors. The content is intended for general information only and does not replace the need for personal advice from a qualified health professional.   

Constipation is when there is a change in the usual pattern of bowel movements, either bowel movement occurs less often than usual, or because it's difficult or painful to have a bowel movement. Constipation can happen for many reasons, and is common in pregnant women and the elderly.

 

If you have constipation, there are two main ways in which you may be affected.

  • You may have regular bowel movements, but it's uncomfortable and you have to strain.
  • You may not have bowel movements as often as you expect.

Constipation is a common reason for people going to see their GP. Around one in six people have constipation. 

The main symptoms of constipation include:

  • straining when trying to have a bowel movement
  • feeling as though you haven't fully emptied your bowels
  • having faeces that are small, hard and/or lumpy
  • having fewer than three bowel movements a week
  • pain or discomfort in your abdomen (tummy)

If you have these symptoms or if you notice any other changes in your usual pattern of bowel movement, you should see your GP. 

If constipation isn't treated it can cause complications, including:

  • faecal impaction - this is when hard faeces collects in your rectum and you reach a point where you probably won't be able to have a bowel movement without treatment
  • overflow incontinence - this is when small amounts of loose faeces leak out around the impacted faeces, without you feeling it
  • bleeding from the anus
  • psychological problems, especially in children, such as holding in faeces because passing them has been painful in the past
  • haemorrhoids (piles) 

There are several reasons why you may develop constipation, including:

  • not eating enough fibre
  • not drinking enough fluid
  • certain medicines, such as antidepressants, calcium or iron supplements or painkillers (eg codeine or morphine)
  • being inactive
  • fear about using the toilet, for example because you worry people can see or hear you
  • stress or depression
  • pregnancy, around four in 10 women who are pregnant have constipation

Constipation can also be a symptom of certain medical conditions, for example:

  • irritable bowel syndrome (IBS)
  • inflammatory bowel disease (Crohn's disease or ulcerative colitis)
  • painful conditions of the anus, such as piles, anal fissure or tears following childbirth
  • conditions affecting the nervous system, such as Parkinson's disease and multiple sclerosis
  • spinal cord injury
  • rectal or colon cancer
  • underactive thyroid

If you are over 40 and develop constipation or notice a change in how often you are having bowel movements, it's very important that you see your GP. 

Your GP will ask about your symptoms and examine you - this may include an examination of your rectum. He or she may also ask about your medical history.

Your GP may refer you for further tests to rule out other medical conditions.

  • Blood tests.
  • Sigmoidoscopy. This procedure involves using a narrow, flexible, tube-like telescope (called a sigmoidoscope) to look inside the rectum and lower part of the bowel.
  • Colonoscopy. This procedure involves using a narrow, flexible, tube-like telescopic camera (called a colonoscope) to look inside the large bowel.
  • Barium enema X-ray. This test involves placing a fluid containing barium (a substance which shows up on X-rays) into the bowel via the rectum. X-ray images of the abdomen then show the inside of the bowel more clearly. 

There are several things you can do to help relieve mild symptoms of constipation.

Self-help

It's important that you include plenty of fibre in your diet as this can help to prevent constipation. Insoluble fibre absorbs water and increases the bulk of waste matter in your bowel, which helps to move digested food through your bowel more easily.

Only food that comes originally from plants contains insoluble fibre. Good sources include:

  • fruit
  • vegetables
  • wholegrain breakfast cereals
  • wholegrain bread
  • brown rice
  • wheat bran

Soluble fibre, such as oats, beans and pulses can also reduce cholesterol in the blood.

It is recommended that everyone eats five portions of fruit and vegetables a day. This can go a long way towards increasing the amount of fibre in your diet, which will improve symptoms of constipation. It may also help to protect you against other health conditions such as heart disease and some cancers. Sprinkling bran onto your food is another easy way to eat more fibre.

If you don't currently eat much fibre, increase the amount in your diet slowly, otherwise you may get bloating and wind. It's important to continue with a high-fibre diet even if your symptoms don't immediately improve as it may take up to four weeks to have an effect.

You may also need to increase the volume of fluid that you drink, especially if you are increasing the amount of fibre you eat. Speak to your GP before making any changes to your diet or the amounts that you eat and drink.

Increasing the amount of exercise you do will probably help to ease constipation too.

Medicines

If lifestyle changes don't help to relieve constipation, your GP may suggest a laxative. There are several types of laxative to help relieve constipation. You may need to try more than one type to help improve your symptoms.

  • Bulk-forming laxatives (ispaghula husk, methylcellulose and sterculia). These are recommended if you can't manage to increase the fibre in your diet. You need to drink at least two litres of fluid intake per day if you take these. They contain a type of fibre and work by increasing the amount of content in your bowel. As this builds up, it stimulates your bowel muscles to move and push the faeces out. It may take a few days for bulk-forming laxatives to work.
  • Osmotic laxatives (macrogols or lactulose). These work by increasing the amount of water in your bowel, making faeces softer and easier to pass. These take a few days to work and it's important to drink water if you take these laxatives.
  • Stimulant laxatives (senna or bisacodyl). These work by stimulating the muscles in your bowel to contract more often and with increased force. These work more quickly than other types of laxative. If you take them at night you are likely to have a bowel movement in the morning. Stimulant laxatives can cause abdominal pain.

Generally, you should only use laxatives occasionally. Once your bowel movement pattern returns to usual, you can try to maintain it by eating a balanced diet with enough fluids and fibre.

You can buy laxatives over the counter from a pharmacist without a prescription. However, it's a good idea to see your GP before trying laxatives because he or she may be able to give you advice on how to relieve your symptoms without needing to use medicines. Always read the patient information leaflet that comes with your medicine and if you have any questions, ask your pharmacist for advice. 

You can reduce your risk of constipation by eating a balanced diet with lots of fibre, drinking enough fluids and taking regular exercise. 

Can I give my child laxatives?

Answer

You shouldn't give your child a laxative without seeing your GP first. Laxatives can help treat constipation but aren't always necessary.

Explanation

 

It's important to be sure that your child really is constipated before giving him or her any treatment. The symptoms of constipation in children include:
  • not having bowel movements very often (every day is normal for young children)
  • straining when trying to have a bowel movement
  • pain on having a bowel movement
  • abdominal (tummy) pain
  • small, hard faeces or occasional very large bowel movements
  • faeces leaking onto underwear
  • being irritable
  • not wanting to use the toilet or straining to stop going
  • poor appetite
  • low energy
  • wind

If you think your child may be constipated, take him or her to see your GP. Your GP may prescribe a macrogol laxative (Lactulose) which can help to soften faeces.

Your GP will also give you advice about diet and fluids for your child. For example, in children under one, constipation may be improved by giving more water and diluted fruit juices, especially prune, pear and apple. Older children should also have enough fibre in their diet and drink plenty of fluid.

It's important to try to help your child stay relaxed about going to the toilet, especially if you are toilet training him or her.

Is constipation common during pregnancy?

Answer

Yes, this is a common problem during pregnancy. Around four in 10 pregnant women get constipated at some point during pregnancy.

Explanation

There are several reasons why pregnant women are more likely to get constipated. The hormones (chemicals produced naturally by your body) produced during pregnancy can affect your bowel, causing it to work more slowly. If you are taking iron supplements, these can also lead to constipation.

You can try to reduce constipation by eating a diet that includes lots of fibre and adding bran or wheat fibre to food. Foods that are high in fibre include fruit (especially prunes) and vegetables, wholegrain bread and cereals, beans and pulses. Drinking plenty of water helps to soften the faeces and may ease constipation. You may also find it helpful to take regular, gentle exercise.

It's important to speak to your midwife, pharmacist or GP before taking any medicines to treat constipation such as laxatives.

Is there any other treatment for constipation if oral laxatives haven't worked?

Answer

If your symptoms of constipation haven't improved through eating more fibre or taking oral laxatives, your GP may suggest a suppository or an enema.

Explanation

Before taking any medicines for constipation, it's best to try to relieve your symptoms by making lifestyle changes such as eating more fibre, drinking plenty of water and taking regular exercise. If this doesn't work, your GP may suggest that you try laxatives tablets or solutions.

If these don't help to ease constipation your GP may suggest using a glycerine suppository each day. This is a stimulant laxative that increases your bowel's activity. A suppository is placed directly into your bowel, and can cause a bowel movement in half an hour. They are only for occasional use to get rid of impacted faeces.

It's also possible that your GP will offer you an enema to soften the faeces in your bowel or to stimulate your bowel to move. You may need to have more than one enema to clear your bowel if the faeces have become very hard. 

Further Information

Sources

  • Constipation. Clinical Knowledge Summaries. www.cks.nhs.uk, accessed 24 May 2010
  • Constipation in adults. BMJ Clinical evidence. www.clinicalevidence.bmj.com, accessed 24 May 2010
  • Constipation, haemorrhoids and heartburn in pregnancy. BMJ Clinical evidence. www.clinicalevidence.bmj.com, accessed 24 May 2010
  • Chronic constipation (primary care). Map of Medicine. www.eng.mapofmedicine.com, published January 2009
  • Crohn's disease. Map of Medicine. Map of Medicine. www.eng.mapofmedicine.com, published April 2010
  • Starchy foods. Food Standards Agency. www.eatwell.gov.uk, accessed 4 June 2010
  • Joint Formulary Committee, British National Formulary. 57th ed. London: British Medical Association and Royal Pharmaceutical Society of Great Britain, 2009: 59
  • The Pregnancy Book. Department of Health. www.dh.gov.uk, published October 2009, accessed 5 June 2010

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