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Carpal tunnel release surgery

Carpal tunnel release surgery is an operation to relieve severe symptoms of carpal tunnel syndrome. It involves dividing a ligament in your wrist to relieve pressure on a nerve.

You will meet the surgeon carrying out your procedure to discuss your care. It may differ from what is described here as it will be designed to meet your individual needs.

About carpal tunnel release surgery

Your GP will usually only recommend that you have surgery for carpal tunnel syndrome if you have moderate to severe symptoms. For example, you may have had tingling, numbness and pain in your hand and forearm that has lasted for six months or longer.

The most common type of surgery is open carpal tunnel decompression. Another type of surgery that is performed by some surgeons is keyhole (endoscopic) carpal tunnel decompression. Your surgeon will discuss which technique is suitable for you.

In both types of surgery, your surgeon will cut the carpal ligament, which is one of the tissues that connect the bones in your wrist together. This will reduce pressure on the median nerve, which runs through your wrist to your hand. If the operation is successful, your symptoms of pain will often go away immediately after surgery, but symptoms of numbness and tingling may take longer to improve as the nerve recovers more slowly.

Illustration showing the carpal tunnel and median nerve

What are the alternatives to carpal tunnel release surgery?

If you have mild symptoms, or only had symptoms for a short time, your doctor will usually recommend that you have non-surgical treatment. If you get carpal tunnel syndrome during the later stages of pregnancy, you will also be advised to have non-surgical treatment. Treatment options include the following.

  • Wrist splints can help keep your wrist straight and reduce pressure on the median nerve. You wear these at night.
  • Hand therapy or physiotherapy, which will include exercises and making changes to your posture, particularly when working at a desk and using a keyboard, may help. Speak to your HR or occupational health department for more information.
  • Steroid joint injections are a good treatment if you have mild to moderate symptoms, or if you have only had symptoms for a short time. Steroid injections work by reducing inflammation around the nerve, which reduces the pressure on it.

If your condition is severe and your GP has referred you for surgery, this is usually after you have tried alternative treatments and they haven’t worked. Surgery is considered a last resort.

Preparing for carpal tunnel release surgery

Your surgeon will explain how to prepare for your carpel tunnel release surgery.

Carpel tunnel release surgery is routinely done as a day-case procedure. This means you have the procedure and go home the same day. It’s usually done under local anaesthesia. This completely blocks pain from your wrist and palm and you will stay awake during the procedure.

Your surgeon will discuss with you what will happen before, during and after your procedure, and any pain you might have. This is your opportunity to understand what will happen, and you can help yourself by preparing questions to ask about the risks, benefits and any alternatives to the procedure. This will help you to be informed so that you can give your consent for the procedure to go ahead, which you may be asked to do by signing a consent form.

What happens during carpal tunnel release surgery?

In the operating room, your surgeon will ask you to sit in a chair, or lie down, and rest your arm out to the side. He or she will apply tight compression with a tourniquet to your upper arm. A tourniquet is similar to a cuff or small sleeve that is used to control blood flow to your hand during the operation.

Your surgeon will inject a local anaesthetic into your wrist and into the palm of your hand. You may feel a sharp sensation as the anaesthetic is injected, but this should pass quickly.

The exact procedure will then depend on whether you’re having open or keyhole surgery. Both types usually take about 20 minutes to complete.

Open carpal tunnel release surgery

In open surgery, your surgeon will make a single cut (3 to 4cm long) near the base of your palm. He or she will then divide the carpal ligament to relieve pressure on the median nerve. Your surgeon will close the cut in your skin with stitches.

Video: how open carpal tunnel surgery is carried out

Keyhole carpal tunnel release surgery

Depending on the technique your surgeon uses, he or she will make either one or two small cuts (about 1 to 2cm long) in your skin. The first cut will be on the inside of your wrist and the second (if you have one) will be in the palm of your hand. Your surgeon will insert small instruments and a tube-like telescopic camera through the cut, or cuts. He or she will then divide the carpal ligament to relieve pressure on the median nerve. Your surgeon will close the cuts in your skin with stitches.

Video: how keyhole carpal tunnel surgery is carried out

What to expect afterwards

After your surgery, it’s important to lift your hand above your heart and move your fingers – this will help to reduce swelling and will prevent stiffness.

After a local anaesthetic, it may take several hours before the feeling comes back into your wrist and hand. Take special care not to bump or knock the area.

You may need pain relief to help with any discomfort as the anaesthetic wears off. You will usually be able to go home when you feel ready.

Your nurse will give you some advice about caring for your healing wounds before you go home. You may be given a date for a follow-up appointment.

The length of time your stitches will take to disappear depends on what type you have. However, for this procedure, dissolvable stitches should usually disappear in about seven to 10 days and non-dissolvable stitches will be removed 10 to 14 days after your surgery.

Your surgeon may ask you to wear a wrist splint and sling after the procedure.

Recovering from carpal tunnel release surgery

It usually takes about eight weeks to make a full recovery from carpal tunnel release surgery, but this varies between individuals, so it’s important to follow your surgeon's advice. It may take several months for the strength in your hand and wrist to return to normal.

Ask your surgeon when you can return to your normal activities. You should be able to drive and do activities that involve light lifting and gripping soon after your operation. Your surgeon will advise you when you can return to work and if there should be any restrictions on your work activities. If you return to work and have a job that involves repetitive movements, it’s important to take regular breaks.

If you need pain relief, you can take over-the-counter painkillers such as paracetamol or ibuprofen. Always read the patient information leaflet that comes with your medicine and if you have any questions, ask your pharmacist for advice.

You may see a physiotherapist (a health professional who specialises in maintaining and improving movement and mobility) who may give you some gentle exercises to do to help reduce stiffness in your hand and get the strength back in your wrist.

What are the risks?

As with every procedure, there are some risks associated with carpal tunnel release surgery. We haven’t included the chance of these happening as they are specific to you and differ for every person. Ask your surgeon to explain how these risks apply to you.


Side-effects are the unwanted but mostly temporary effects you may get after having the procedure. For carpal tunnel release surgery, these may include:

  • pain and discomfort in your wrist and hand
  • a scar – this may be tender


Complications are when problems occur during or after the procedure. Complications of carpal tunnel release surgery include:

  • infection – you may need to take antibiotics to treat this
  • damage to nerves, blood vessels or tendons in your wrist. This may require further surgery to repair the damage
  • loss of strength and stiffness when pinching or gripping objects – this is usually temporary and improves as your wrist heals
  • continuing pain at the site of the scar and numbness – sometimes it can take several months for the discomfort to disappear completely
  • reoccurrence – it’s possible that the symptoms of carpal tunnel syndrome may return

If you’re having a keyhole procedure, it’s possible your surgeon may need to convert to open surgery if there are any complications.


Produced by Rachael Mayfield-Blake, Bupa Heath Information Team, September 2012.

For answers to frequently asked questions on this topic, see FAQs.

For sources and links to further information, see Resources.

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  • This information was published by Bupa's Health Information Team and is based on reputable sources of medical evidence. It has been reviewed by appropriate medical or clinical professionals. Photos are only for illustrative purposes and do not reflect every presentation of a condition. The content is intended only for general information and does not replace the need for personal advice from a qualified health professional. For more details on how we produce our content and its sources, visit the about our health information page.

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