What is cryotherapy?

In the UK, cryotherapy is only available either in specialist centres or as part of a clinical trial. Cryotherapy is a treatment that uses extreme cold to freeze and destroy cancer cells. You might also hear it called cryosurgery or cryoablation. Thin needles are put into the prostate and a gas is passed down them to freeze and kill the cancer cells.

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Types of cryotherapy

There are two types of cryotherapy.

  • Whole-prostate cryotherapy treats the whole prostate, including both the cancer cells and the healthy prostate tissue.

Whole gland cryotherapy

  • Focal cryotherapy only treats the part of the prostate where the cancer is. It uses fewer needles, which means less healthy tissue is frozen than in whole-prostate cryotherapy.

focal cryotherapy

Focal cryotherapy isn’t suitable for everyone and will depend on the stage and grade of your cancer.

Who can have cryotherapy?

In the UK, cryotherapy is only available either in specialist centres or as part of a clinical trial. This is because it is newer than some other treatments, so we don’t know as much about the risk of side effects or how well it works in the long term.

Cryotherapy could be a suitable first treatment if your cancer hasn't spread outside your prostate (localised prostate cancer) and is in CPG 1-3 (low or medium risk of spreading).

You may be able to have cryotherapy as part of a clinical trial only, if: 

Cryotherapy can also be used to treat localised prostate cancer that has come back after treatment with external beam radiotherapy or brachytherapy. This is called salvage cryotherapy.

Cryotherapy can be used to treat localised prostate cancer that has come back after treatment with high-intensity focused ultrasound (HIFU), if a second HIFU treatment is not suitable.

Speak to your doctor about whether cryotherapy is a suitable option for you and whether it’s available in your area.

Other treatment options

The stage and grade of your prostate cancer helps your doctor to decide which treatment you may need. Read more about the treatment options for localised prostate cancer, locally advanced prostate cancer and advanced prostate cancer.

What are the advantages and disadvantages?

If you're thinking about having cryotherapy, speak to your doctor or nurse before deciding whether to have it – they can help you choose the right treatment for you. Take time to think about whether you want to have cryotherapy. We've included a list of questions that you might find helpful. You can also ask about any other treatments that might be available.


  • Cryotherapy is less invasive than some other treatments, with little or no bleeding.
  • You’ll only be in the hospital for up to 24 hours.
  • Recovery is usually quick and most people return to their normal activities within a few weeks.
  • You may be able to have cryotherapy if your cancer has come back after radiotherapy, brachytherapy or HIFU.
  • You may be able to have cryotherapy again if your cancer comes back after your first cryotherapy treatment. This isn’t the case with all treatments.


  • You might get side effects such as erection and urinary problems.
  • Compared with other treatments, we don’t know as much about how well cryotherapy works or the risk of side effects in the long term (after 10 years).
  • Cryotherapy isn’t widely available in the UK.

What does cryotherapy involve?

Each hospital does things differently. We've included some general information below about what might happen. Your doctor or nurse will give you more information about what will happen before, during and after your treatment.

Before your treatment

Your bowels need to be empty during cryotherapy so that your doctor can take clear scans of your prostate. You may be given a laxative or enema to empty your bowels before the treatment. An enema is a liquid medicine put inside your back passage. You’ll also be asked not to eat for about six hours before the treatment. This is so that health professionals can safely give you the general anaesthetic. But you will still be able to drink water up to four hours before the treatment.

During your treatment

Cryotherapy is usually done under general anaesthetic so that you’re asleep and won’t feel anything. If you can’t have a general anaesthetic for health reasons, you may be able to have a spinal (epidural) anaesthetic, so that you can’t feel anything in your lower body. Your cryotherapy treatment will be done by a urological surgeon. You may also hear them called a urologist or consultant urologist.

Your surgeon will pass a tube, called a warming catheter, up your penis and into your bladder. Warm liquid is passed through the catheter during the treatment so that your urethra and urethral sphincter) are protected from the very low temperatures.

Your surgeon will place an ultrasound probe inside your back passage. This takes images of your prostate so they can see where to put the needles. They will put several thin treatment needles through the skin between your testicles and back passage (perineum), and into your prostate.

Your surgeon will also put in some other thin needles through the perineum to monitor the temperature in and around your prostate. This is to make sure the areas being treated reach the correct temperature while the areas around your prostate, such as your back passage, do not freeze.

Freezing gases are passed down the treatment needles, causing the temperature to drop to about -40°C. This destroys the prostate tissue by freezing it. Your prostate is then allowed to warm up, either naturally, or by passing a different gas through the needles. This process of freezing and warming is usually carried out two to three times. The whole process takes about one to two hours.

The needles, probes and warming catheter are then removed.

You’ll then have another tube put in through your penis (urethral catheter) or through a small cut in your lower tummy (suprapubic catheter). This is to drain urine out of your bladder. Some hospitals may put a suprapubic catheter in before treatment. Your catheter will be left in for a week or two.

After your treatment

Most people can go home on the same day after their treatment. Some people need to stay overnight and go home the following day. It’s normal to have some pain or discomfort. Your doctor or nurse will tell you which pain-relieving drugs you can take.

You’ll be given antibiotics to take for a few days, to lower your risk of infection. Contact your doctor or nurse if you have any signs of a urine infection, such as:

  • a high temperature (fever)
  • feeling shivery
  • a burning feeling when you urinate (pee)
  • dark, cloudy, or strong-smelling urine
  • needing to urinate more often than usual.

You may be given drugs called alpha-blockers, such as tamsulosin or alfuzosin. They help to relax the muscles in and around your prostate to help you urinate. You may need to take them for a few weeks or longer if you still have problems urinating. Alpha-blockers can cause side effects, so ask your doctor or nurse about these if you have any worries.

Cryotherapy usually causes the prostate to swell to begin with, which can make it difficult to urinate. You’ll go home with your catheter in place to drain urine from your bladder until the swelling has improved. Your urine will drain into a bag that you can empty. Or you might be offered a catheter valve instead of a bag. The valve fits on the end of the catheter tube and works like a tap. This means your urine will be stored in your bladder as usual. When you need to urinate, you can open the valve to empty your bladder.Your nurse will show you how to care for your catheter before you leave hospital.

Your catheter will usually be taken out at hospital one to two weeks after your cryotherapy treatment. This may feel uncomfortable but should not be painful. You’ll need to stay at the hospital for a few hours afterwards to check that you can urinate properly.

When the catheter is first removed, you may find that you leak urine. It’s a good idea to take spare underwear and trousers with you to the appointment. You can wear incontinence pads to absorb the urine – check if your hospital will provide these. If not, you can buy some at a pharmacy and take them with you to the appointment.

You may see some blood in your urine while the catheter is in place, and immediately after it’s taken out. It is also common to find a little blood in your urine every one or two weeks. This is normal and can happen up to three months after your treatment. Drink plenty of fluids to help clear the blood. If you see signs of infection or lots of blood clots in your urine, speak to your doctor or nurse.

What happens next?

You will have check-ups with your doctor or nurse at the hospital. These are called follow-up appointments, and will include regular PSA tests. The PSA test is a blood test that measures the amount of a protein called Prostate Specific Antigen (PSA) in your blood. It’s a good way to check how well the cryotherapy has worked. You may also have an MRI scan after treatment to check all your cancer has been treated.

How often you have check-ups will depend on your hospital, but you should have a PSA test about every three to four months for at least the first year, and every six months after that. Ask your doctor or nurse how often you’ll have PSA tests. Find out more about how the PSA test is used to check if your treatment has worked.

If your cancer has come back, your doctor will talk to you about further treatment options. Your doctor will probably suggest you have a second treatment of cryotherapy before having other treatments such as radiotherapy or surgery to remove your prostate (prostatectomy).

What are the possible side effects?

Like all treatments, cryotherapy can cause side effects. These will affect each person differently, and you may not get all of them.

The most common side effects of cryotherapy are erection and urinary problems.

Many of the side effects of cryotherapy are caused by healthy tissues being frozen and damaged. Side effects are more likely if you’ve already had radiotherapy or brachytherapy to your prostate. This is because these treatments may have already damaged the area around your prostate.

Focal cryotherapy can cause the same side effects as whole-prostate cryotherapy. But research suggests focal cryotherapy causes less severe side effects, because a smaller area of the prostate is damaged than with whole-prostate cryotherapy.

Ask your doctor or nurse for more information about your risk of side effects. They may be able to show you results of treatments they’ve carried out and put you in touch with other people who’ve had cryotherapy.

The most common long-term side effect of cryotherapy is difficulty getting or keeping an erection (erectile dysfunction). This is because the treatment can damage the nerves that control erections.Studies suggest that more people get their erections back after focal therapy, because less healthy tissue is damaged than with whole-prostate cryotherapy.

Some find these problems improve with time, but not all of them get their erections back. There are treatments that can help with erection problems.

Cryotherapy can cause urinary problems such as leaking urine or trouble controlling your flow (incontinence). Most people have some urinary problems for the first three to four weeks after cryotherapy. Most of them find these problems improve after a few weeks or months. But others have problems for longer, and they may never get better.

Cryotherapy can cause your urethra to become narrow. This is called a stricture, and it can make it difficult to empty your bladder (urine retention). Urine retention can lead to urine infections or painful bladder stones. If it’s not treated, it can damage your kidneys.

Both leaking urine and difficulty urinating are more common in men who have cryotherapy as a salvage treatment after radiotherapy.

There are ways to manage leaking urine or difficulty urinating.

You might have some bruising and swelling around your testicles, buttocks, and inner thighs for a few days after having cryotherapy. This can be worrying but is normal and will pass. It may help to wear tighter underwear for support. Holding an ice pack against the bruised and swollen area for 10 minutes every hour may help to reduce the swelling. Your doctor or nurse may tell you not to stand for long periods of time for the first few weeks, as this can cause the prostate to swell more.

It’s also normal to have some pain or discomfort , sometimes for a few weeks or a couple of months. This may be in the area in or around your penis, testicles and back passage. You might also find it painful when you urinate.

You’re more likely to get pain if you’ve had another treatment before cryotherapy. Pain usually improves, and pain-relieving drugs can help. Your doctor or nurse can tell you which ones you can take.

You should be able to go back to your day-to-day activities as soon as you feel able to. But it may take a few weeks or months before you feel back to normal.

Cryotherapy damages the prostate, which makes the fluid that carries sperm. This means you may not be able to have children naturally afterwards. If you’re planning to have children, you may be able to store your sperm before cryotherapy. Ask your doctor or nurse about this.

In very rare cases, cryotherapy may cause a hole between the back passage and urethra, called a rectal fistula. It's slightly more common if you've already had radiotherapy to treat your prostate cancer, but it's still very unlikely that you will get this.

It can cause urine to leak from your urethra into your back passage, or bowel contents to leak from your bowel into your urethra. Signs include:

  • urine coming out of your back passage
  • pain in your pelvis or back passage
  • bowel contents in your urine
  • air bubbles in your urine
  • urine infections, although these can be caused by other things.

A rectal fistula can develop several months after treatment. Talk to your doctor or nurse straight away if you think you may have one. If you do have a fistula, you'll need to have an operation to repair the hole.

Dealing with prostate cancer

Being diagnosed with prostate cancer can change how you feel about life. If you or your loved one is dealing with prostate cancer you may feel scared, stressed or even angry. There is no ‘right’ way to feel and everyone reacts differently. There are things you can do to help yourself and people who can help.

If you are close to someone with prostate cancer, find out more about how you can support them and where to get more information.

Questions to ask your doctor or nurse

You may find it helpful to keep a note of any questions you have to take to your next appointment.

  • Where is this treatment available?
  • What are my other treatment options?
  • Will I have focal or whole-prostate cryotherapy?
  • What are the side effects of cryotherapy, how likely am I to get them, and how can they be managed?
  • How much experience do you have in carrying out cryotherapy? Can I see the results of treatments you've carried out?
  • How often will you check my PSA level after the treatment?
  • How will I know if the treatment has worked?
  • How likely is it that I'll need more treatment after cryotherapy?
  • What treatments are available after cryotherapy?

List of references and reviewers

Updated: January 2022 | To be reviewed: January 2025

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  • Hashim Ahmed, Professor of Urology & Consultant Urological Surgeon, Imperial College Healthcare NHS Trust
  • Manit Arya, Consultant Urological Surgeon, Imperial College Healthcare NHS Trust
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