What are late effects of radiotherapy?

 

  • New side effects that start 3 – 6 months or more after your radiotherapy has ended. New side effects may begin suddenly or gradually.  They may happen many months, years or decades after your radiotherapy has ended.  OR
  • Early side effects that carry on for more than 3 months after your radiotherapy has ended. Please note, for some people, side effects begin to settle after 3 months. 
Image
Man lying in radiotherapy machine

Interesting things to know

 

Why do people get side effects from radiotherapy?

  • These side effects can happen when the non-cancerous cells in the tissues near to your prostate, are damaged by the radiation. 
  • The area where your prostate lies is called the pelvis or pelvic area. 
  • This area includes other organs like your bladder and bowel. 
  • The collection of symptoms or side effects you may get after radiotherapy is sometimes called pelvic radiation disease (PRD). 

 

What is pelvic radiation disease (PRD)?

Pelvic Radiation Disease (PRD) is defined as one or more ongoing (chronic) symptoms

of variable complexity that may affect people who have previously had radiotherapy to

the pelvic region to treat their cancer. Pelvic Radiation Disease Association.

 

The Pelvic Radiation Disease Association (PRDA) is a patient charity dedicated to improving the care of patients with PRD. The website provides useful information for patients suffering with symptoms. This includes practical help and an online community. 

 

 

What long-term side effects may I get after radiotherapy for prostate cancer

Adapted from the The Royal College of Radiologists (RCR) prostate cancer consent form.

The RCR have put together disease and site specific national consent forms. These are intended to support healthcare professionals. They make sure that patients have advice about the benefits and side effects of treatment that is:

  • Clear
  • Relevant
  • Consistent .

 

Long term side effects of radiotherapy infographic

Can these side effects be prevented?

  • Before you start your radiotherapy, a lot of careful planning takes place. See our page on external beam radiotherapy. For example, bowel and bladder preparation.  
  • This helps to reduce the chance of severe long-term side effects. 
  • There are many other things that may impact side effects. For example, other medical conditions that you have. Your doctor or therapeutic radiographer will assess these risks before your treatment. 

 

 

Where do I go to get help?

The first step will be to talk to your GP or healthcare team. They will ask you questions about your symptoms. For example:

  • When they started
  • How often you are getting the symptoms
  • How they are affecting your quality of life.

Doctor talking to patient

  • They may then: 
    • Prescribe medications. This will depend on your symptoms. 
    • Refer you on to other specialist services. The type of service you see will depend on your symptoms. Some examples of the services you may visit listed below. 
Support services
  • Most hospitals will have a continence service. They will often be staffed by continence nurse specialists and pelvic health physiotherapists.
  • They can support you if you have:
    • Bladder problems like: 
      • Needing to pee in a hurry
      • Peeing more than usual
      • Leaking pee.
    • Bowel problems like: 
      • Constipation
      • Loose poo.

The team will ask you:

  • To describe the problems you are having
  • What medications you are taking
  • About your medical history
  • What has helped your problem or what has made it worse
  • They may refer you for more tests to help find out what is causing your problems. 
  • To find a continence service near you, look at our local services finder.

     

nurse talking to patient
  • Some hospitals run a ‘late effects service’. 
  • There is no set standard for what they offer to patients. 
  • Where some are very general, others specialise in: 
    • Stomach and bowel (gastrointestinal) or 
    • Peeing (urology) issues. 
  • They are often run by specialist therapeutic radiographers. 
  • They also have access to a wider team of specialist dieticians and continence specialists. 

 

What do they do?

They aim to help people to live well with the late effects of radiotherapy. 

They can offer:

  • Advice and support to help you manage your symptoms
  • Emotional support
  • Advice on medications.
  • Referrals to other specialists e.g. gastroenterologists if they feel that you need extra support or tests.
  • The Pelvic Radiation Disease Association has a list of current late effects services (link will open in a new tab).  
  • This is not exhaustive. Services may change and new services may be added. 
  • Check with your GP or healthcare team if you feel you may benefit from a referral. 
Radiotherapist talking to patient
  • A gastroenterologist is a medical doctor who specialises in conditions that affect the gastrointestinal tract. 
  • This includes:
    • The food pipe (oesophagus)
    • Stomach and intestines (small and large bowel)
    • Liver
    • Bile duct 
    • Gallbladder
    • Pancreas. 
  • They are usually supported by a specialist nursing team. 
  • They will ask you about your symptoms and order more tests. 

 

Diagram of the human digestive system

What tests might I have?

This will depend on what symptoms you are having. See below for more information on the tests you may have for each symptom.

Tests you may have

 

Blood in poo illustration

 

  • Your doctor will usually carry out a rectal examination. 
  • This involves them putting a gloved finger into your back passage (rectum). 
  • They may also ask you for a sample of poo for testing. 

 

In some cases, you may have to have a camera passed into your bottom. This can be:

  • A flexible sigmoidoscopy. This looks at the lower part of your bowel. See this animation by Cancer Research UK for more information about this test. The link will open in a new tab.  This will be carried out at the hospital.
  • A colonoscopy: This looks at the whole of your large intestine. Look at this video from the NHS that explains what happens during a colonoscopy. 
  • You may also have some blood tests to check your iron levels and general health.
Blood in pee illustration

 

  • This can be caused by something simple like an infection in your pee. 
  • Your GP may ask you for a sample of your pee. 
  • This will be sent off for testing. 
  • If you do have an infection, your GP may give you antibiotics.  

 

However, if they are worried, your doctor may refer you the urology team. They will carry out more tests. This may be: 

  • A cystoscopy. A camera is passed into your bladder. This is done under a local anaesthetic. It can be done under a general anaesthetic if you are concerned about being awake during the procedure. More information can be found on the NHS website. This link will open in a new tab.

    Male cystoscopy diagram

     

 

Illustration of man standing over toilet

 

Problems with peeing may include:

  • Peeing more than normal
  • Needing to pee in a hurry (urgency)
  • Not being able to hold on to your pee
  • Dribbling after you have finished peeing. 

 

In addition:

  • Your flow of pee may be slower than normal.  
  • You may find it hard to control the direction of your pee. 
  • If you have any of these symptoms it may mean that you have narrowing or scarring in the tube that goes from your bladder to the outside (urethra). This is called urethral stricture.

 

Your GP may talk to you about medicines that can help to reduce the leaking. If these do not work they may refer you to a urologist who will carry out further tests. These tests may include:

  • An examination of your penis – sometimes narrowing can be seen at the tip of the penis. 
  • A cystoscopy 
  • A CT urogram. 

    • This is a type of CT scan.
    • It looks at the organs of your urinary system. 
    • This includes the kidneys, bladder and ureters. 
    • Your ureters take pee from your kidneys to your bladder.

     

The urinary system

 

  • A urethrogram. 
    • This is an X-ray that shows the inside of your urethra. 
    • A tube (catheter) will be passed into the pipe that takes pee from your bladder to the outside (urethra). 
    • An X-ray dye will be passed into the catheter. This allows the clinician to see if there are any problems. 
    • For more information, read this leaflet from South Tees Hospitals NHS Foundation Trust. 
  • An ultrasound scan. An ultrasound scan uses high-frequency sound waves to make an image of part of the inside of the body.Visit the NHS page on ultrasounds for more details.
  • An MRI scan.  See our page on MRI scans. Link will open in a new tab. 
  • Urodynamics test. This looks at how well your bladder is working.  For more information read this leaflet form Cambridge University Hospitals NHS Foundation Trust. 

You may also be asked to keep a bladder diary. Take a look at these examples. Both of these links will open in a new tab:

  • Your doctor will ask you some questions about your symptoms.
  • They may also want to find out how much your symptoms are affecting your everyday life. 
  • See the poo chart below for questions to think about before your appointment:

 

Questions about your bowel movements infographic

 

  • It may be a good idea to keep a food and drink diary for a week before you see your doctor. 
  • Make a note of what you are eating and any symptoms that you may have. 
  • Examples of food diaries can be found at:

What symptoms may I get?

A. Constipation

You may be offered a medicine called a laxative. This will help you to poo. More information can be found on the NHS laxative webpage. This link will open in a new tab. You may also be given advice on your:

  • Fibre and fluid intake
  • Daily exercise
  • Toileting routine

 

Toileting routine and correct positioning on the toilet

  • Try to keep to a regular time each day. 
  • Give yourself plenty of time to have a poo. 
  • Go to the toilet when you feel the urge. Try not to hold on too long.
  • Try putting your feet on a low stool. Raising your knees above your hips can help.

 

Toilet positioning

  • Breathe slowly and regularly. Try not to hold your breath. 
  • Try to relax and do not strain. 
  • The Bladder and Bowel Community support people who are living with conditions that affect their bladder or bowel. 
  • They have a useful webpage called ‘toilet positions to relieve constipation’.  This link will open in a new tab. This gives some pointers that may help you to empty your bowels. 

 

B. Loose poo (diarrhoea)

  • You may be given a medicine that will help to slow down the passage of food as it passes through your gut. 
  • This is called Loperamide (Immodium). To find out more about loperamide, visit the NHS England website. This link will open in a new tab.
  • This medicine allows your body to reabsorb more water. This helps to thickens up your poo. 
  • Pelvic floor exercises may also help. Learn more about the pelvic floor and exercises later in this page. You may also be given advice on:
    • Healthy fibre and dietary fat intake
    • Giving up smoking
    • Cutting out fizzy drinks 
    • Cutting out or down food containing sorbitol. E.g. chewing gum and sugar free drinks or sweets.

 

C. Farting or wind (flatulence). 

  • There are several possible causes for wind. 
  • The treatment will depend on the actual cause of your wind. 
  • You may be referred to a dietician who may ask you to keep a food diary for 7 days before you see them. 
  • The Guts charity have a good leaflet that covers:
    • The different types of wind
    • Possible causes of wind
    • Symptoms
    • What you can do to help yourself
    • Diet and other treatments.

 

D. Bleeding from the back passage (Rectal bleeding)

Blood in poo

 

  • If you already have piles (haemorrhoids) or have had piles before, these can flare up with the radiotherapy. 
  • The lining of the bowel can be damaged after radiotherapy. 
  • As part of natural healing, the bowel makes new, small blood vessels. These are called telangiectasias. These are formed on the surface of the bowel lining. 
  • They may be broken when:
    • You strain too hard when on the toilet
    • Your poo is hard
    • You are pooing quite often.
  • Sometimes they will just break for no reason. 
  • You will probably be sent for either a sigmoidoscopy or colonoscopy to rule out any other serious cause for the bleeding. 
  • See Macmillan Cancer support for more information.

 

E. Pain in and around the back passage

Painful back passage illustration

 

  • If the skin in this area gets sore or broken, talk to your healthcare team for advice. 
  • Try to avoid perfumed soaps or shower gels. 
  • Use soft, unperfumed toilet paper or a damp cotton wool pad after having your bowels open.
  • Pat rather than rub around your back passage after a shower or bath.
  • If you wear incontinence pads, make sure you change them regularly.
  • Avoid tight jeans or trousers that may rub on the area. 
  • Your healthcare team may be able to prescribe a barrier ointment or cream. The barrier ointment will protect the area. Creams may make you feel more comfortable. 
  • If you get pain when opening your bowels, your doctor may prescribe a local anaesthetic gel.

 

F. Pelvic pain

 

  • Some people get cramping pain, spasms or colic type pain before, during or after they have their bowels open. 
  • If this happens to you, your GP may offer you anti-spasmodic medicines like buscopan or  mebeverine (both links take you to the NHS webpage for these medicines). 
  • You may also be advised to take peppermint oil or drink peppermint tea. 

Other things that may help include:

Things you can do to help yourself

 

Man and woman preparing food

 

 

Visit a dietician

  • If you are struggling with your diet, you can ask to be referred to a dietician. 
  • If you have been referred to the radiotherapy late effects service, they may be able to make this referral. 
  • Otherwise, your hospital may have an oncology dietician who can help with your symptoms.
  • You can also access a dietician privately. The British Dietetic Association have a ‘find a dietician’ page This link will open in a new page. 
  • Many dieticians now carry out consultations online as well as face-to-face. 
  • Dieticians can offer dietary advice on a number of different areas. 

Many issues with peeing, pooing and erections can be helped by strengthening the pelvic floor muscles. The pelvic floor is important in: 

  • Bladder and bowel control
  • Helping to keep an erection

In men, the pelvic floor goes from the tailbone (coccyx) to the pubic bone. It supports the bladder and bowel.

 

Male pelvic floor muscles

 

Expectations around late effects

  • It may not be possible to get rid of late effects altogether. 
  • However, with help and support the effects should have less impact on your everyday life. 
  • If you had problems with your bowel before your radiotherapy, they are unlikely to go away. 
  • You may find it helpful to speak to a psychologist to help you manage your feelings around living with these side effects. Ask your GP or healthcare team.

When should I get urgent help?

Call 999 if any of the following happen:

  • If you start to bleed a lot, very quickly (haemorrhage) from your back passage (anus). 
  • If you get a sudden, very bad pain in your stomach (abdomen). 
  • If you can’t pee or find it very difficult to pee.

     

About this information

  • This information was published in July 2024. We will revise it in July 2026.
  • References and bibliography available on request.
  • If you want to reproduce this content, please see our Reproducing Our Content page (this link will open in a new external tab).

The toolkit is an information resource for people affected by prostate cancer. The development has been funded through an educational grant from Advanced Accelerator Applications (A Novartis Company).

Organisations where you can get help

 

The Bladder and Bowel Community

  • The Bladder and Bowel Community (link opens in new external tab) is the UK-wide service for people with bladder- and bowel- control conditions.  
  • They provide information and support services, including a managed online support group, for anyone affected by these conditions. There is also information for families, carers and healthcare professionals. 
  • They can provide you with a physical or digital  ‘Just can’t wait’ (link opens in new external tab) toilet card.

 

Bladder and Bowel UK

  • Bladder and Bowel UK are part of an organisation called Disabled Living. Disabled Living is a registered charity which was established in 1897. They provide impartial information and advice about equipment and services for disabled individuals, their families and carers. Visit the Disabled LIving website (link opens in a new external tab) for more information.
  • Bladder and Bowel UK work to improve awareness and find solutions to bladder and bowel problems. 
  • They have a helpline where you can receive advice on bladder and bowel health, continence promotion and options for managing incontinence, products, as well as signposting to services. 
  • You can contact the helpline team by completing the form on the Bladder and Bowel UK website (link opens in a new external tab). If you are not able to complete the form, you can call the helpline on 0161 214 4591. Calling their number will cost the standard rate. 
  • They also have a shop supplying continence and mobility products. This is run in partnership with with Countrywide Health & Mobility. 
  • Visit the Bladder and Bowel UK website (link opens in a new external tab) for more information.

 

Continence Product Advisor

  • The Continence Product Advisor is a collaboration between the International Consultation on Incontinence (ICI), the International Continence Society (ICS), University of Southampton and University College London. 
  • The Continence Product Advisor website is designed to give users, carers and healthcare professionals detailed, essential information about products for:
    • Bladder
    • Bowel
    • toileting problems. 
  • It is hosted and maintained by the International Continence Society.
  • the Continence Product Advisor provides information which is:
    • Evidence-based – including the product advisor, shown to improve confidence in product selection 
    • Independent – without industry sponsorship or brand promotion 
    • Comprehensive – a one-stop information resource covering all key product designs 
    • Not for profit and freely available – with downloadable resources 
  • Find out more by visiting the Continence Product Advisor website (link will open in a new tab).

 

The Pelvic Radiation Disease Association

  • PRDA is a UK charity whose objectives are to see that: 
    • The effects of PRD are minimised
    • That people affected by PRD are given the best possible care and treatment
    • That PRD is accepted as a serious problem and given the attention it deserves. 

They have a number of support services that are free to access. For example:

  • An online community 
  • A monthly ‘chat together’ peer support group
  • They also have a resources section
  • This covers topics such as: 
    • Asymptoms checklist and diary
    • Diet and nutrition
    • Downloadable toilet card
    • Resources for financial and social support.

 

Guts UK

 

Prostate Cancer UK

Prostate Cancer UK  have a fact sheet all about the pelvic floor and exercises you can do. 

 

Penny Brohn

  • Penny Brohn UK (link opens in new external tab) is a UK based health and wellbeing charity that provides cancer care for:
    • Your mind
    • Body
    • Emotions
    • Heart
    • Soul
  • Their services are open to anyone aged 18 and over who has a cancer diagnosis, and to people in a close supporting role. Services can be accessed online and at their centre in Bristol. They also run online group sessions. 
  • They have a page all about diet and nutrition called 'Eating well with cancer' (link will open in a new tab). This has lots of information on the foods to prioritise to improve physical and mental wellbeing. It also has specific advice on eating well during cancer treatment, or eating when you lose your appetite
  • They also have a page called 'Move more with cancer' link will open in a new tab). This section covers the benefits of physical activity. It also talks about the most appropriate exercises to do during chemotherapy, radiotherapy and after surgery. 

 

Clinimed

  • Clinimed are a product marketer. They have worked with Gerard Greene. 
  • Gerard is a pelvic health therapist from the UK.
  • They have produced a series of videos on pelvic health exercises for men.

 

Michelle Kenway

 

Information to read

 

Apps

  • The Squeezy app is an NHS endorsed app that helps you to remember to do your exercises. 
  • It also has advice on how to do your exercises properly. 
  • There is a cost of £2.99. However, some hospitals are signed up to Squeezy connect. This allows your healthcare team to provide you with a free version. Ask you healthcare team for more details.
  • Vist the Squeezy website (this link will open in a new tab) for more information.  

About this information

  • This information was published in July 2024. We will revise it in July 2026.
  • References and bibliography available on request.
  • If you want to reproduce this content, please see our Reproducing Our Content page (this link will open in a new external tab).

The toolkit is an information resource for people affected by prostate cancer. The development has been funded through an educational grant from Advanced Accelerator Applications (A Novartis Company).

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