Your Tonsillectomy as Day Surgery

This guide is written by the Royal College of Anaesthetists. Used here with permission.


What are tonsils and why do they need to come out?

Tonsils are lymph glands, which fight infection and often become infected themselves. They are at the back of the mouth on each side.

You may be better off without them:

  • If they are repeatedly or always infected
  • If they get so large that they cause difficulty with breathing when you are asleep. This is also called sleep apnoea or upper airway obstruction.

The operation is usually successful in removing or reducing these problems. Your surgeon will be able to tell you more about this.


Before your operation you will be asked some questions to check your health and to find out who can look after you at home.

  • Before the day of your operation, you may be asked to come to a pre-assessment clinic. Nurses and/or doctors talk to you and examine you.
  • You may be asked to fill in a questionnaire at home.
  • You may be asked for this information on the day of your operation, when you arrive in the day surgery unit.

The doctors and nurses should make sure you have all the information you need before you have your surgery. If you have questions before the day, please contact the day surgery unit.

Before your operation

The hospital will send you advice about the arrangements for your operation.

  • It is helpful if you bring a list of all the medicines, pills or herbal remedies that you are taking as these may affect the operation or the anaesthetic.
  • It is important that you provide information about any allergies that you may have.
  • It can be helpful to make a note of any questions that you want to ask including anything that worries you.
  • If you are unwell when you are due to come into hospital, please telephone the day surgery unit for advice.

On the day of your operation

You will receive instructions about when to stop eating and drinking (fasting). It is important to follow these. If there is food or liquid in your stomach during your anaesthetic, it could come up into the back of your throat and damage your lungs.

When you arrive at the day unit, a nurse will welcome you and show you around. Your blood pressure, pulse and temperature will be measured. The surgeon and anaesthetist will come and talk to you before the operation. They will explain what is involved and answer your questions before asking you for your consent.

You will be asked to sign a consent form for the operation. Even after you have signed it, you can still decide that you do not wish to go ahead. You can have more information and more time to decide if you want. Nothing will happen to you until you understand and agree with what has been planned for you.

You will be asked to change into an operating gown and to wear an identity band.

The anaesthetic room

Most people go to the anaesthetic room on a trolley. Sticky pads are used to attach monitoring leads on your chest (they do not hurt). Monitoring equipment is used to measure your heart rate, blood pressure and oxygen levels in your blood.

Your anaesthetic

The operation normally takes place under a general anaesthetic, which means you will be unconscious.

The anaesthetist usually does this by:

  • Giving drugs through a cannula (a soft plastic tube inserted using a needle into a vein in the arm or hand). These take less than a minute to take effect.
  • Continuing the anaesthetic with gases and vapours, or by giving more drugs through your cannula.
  • Inserting a tube into your throat for you to breathe through while you are anaesthetised. The surgeon works around this tube and it keeps your airway open and clear during the operation. It is taken out before you wake up but often causes a sore throat.

You can find more information in the separate leaflet ‘Anaesthesia Explained’.

It is possible to do this operation with a local anaesthetic but this is uncomfortable and rarely used.

The operation

The surgeon removes the tonsils through the mouth. The surgeon seals any bleeding areas that are left with localised high frequency electrical current or silk thread ties. If ties are used, these fall away after several days and do not need to be removed. The operation leaves raw areas where the tonsils were. These will heal over the next couple of weeks.

During and after the operation

The anaesthetist may give you:

  • Fluid through your cannula (‘a drip’). This is sterile water with salt or sugar added and it helps prevent dehydration.
  • Drugs which reduce your pain and sickness later.

Pain relieving drugs may be given by:

  • Injection into your cannula
  • Injection into a muscle
  • Inserting a suppository into your back passage (rectum). Your anaesthetist should discuss this with you beforehand. It is inserted while you are anaesthetised.
  • Tablets or medicines, when you are ready to swallow.

The recovery room

You will regain consciousness in the recovery room. You will be breathing oxygen through a clear plastic mask. This is standard practice after surgery. Oxygen does not smell unpleasant. Recovery staff will be with you at all times and they will continue to monitor your blood pressure, oxygen levels and pulse rate.

You will be able to talk but there will be some pain, which will be similar to that of tonsillitis. You will be given more pain relieving drugs until you are comfortable.

The rest of the day in hospital

You will gradually be able to sit up and then get up. You can have a drink and you may be allowed something light to eat. If you are in pain you will be offered further pain relief medicines before you go home.

You will receive further advice from the doctors and nurses about what to expect when you are at home. They will answer any questions that you may have. You can go home when you feel comfortable and when you and the hospital staff are satisfied with your recovery.

The journey home and your first night

It is important that:

  • You receive further advice from hospital staff about what to expect at home.
  • You have someone to drive you home and a responsible adult in the house with you during the night. If this is not possible then we recommend that you stay overnight in hospital.
  • You know who to contact should there be problems.

Occasionally, it is necessary to stay overnight because of drowsiness, vomiting or bleeding. Some day surgery units do not have overnight beds and you may be taken to a different hospital to stay overnight.

Advice for when you get home

  • We suggest that you try to eat normal food as soon as possible. It is important that you have plenty to drink. For comfort, avoid alcohol and spicy or very hot foods.
  • You will have medicines or tablets to reduce pain. These are best taken regularly at first and where possible you should take them half an hour before meals, unless the instructions on the package say otherwise. Soluble medicines, dissolved in water, will be most comfortable for you.
  • Some pain relief medicines contain codeine, which may cause constipation. Extra drinks and fruit or fibre in your food will help, or a mild laxative may be necessary.
  • Any medicines or tablets that you normally take can be taken when you get home, unless you are advised otherwise.
  • You must not take medicines that contain aspirin, as this may cause bleeding. If you normally take aspirin to thin your blood, you should have already received advice from your hospital doctors about when it is safe to restart. If not, or if you are unsure, please ask the doctors on the ward before you leave.
  • If you are taking the oral contraceptive pill and you have been prescribed antibiotics, the effect of the pill may be reduced. You may need to use additional methods of contraception. Your GP can give you more information about this.
  • Salt-water gargles after meals can help to keep your mouth refreshed (one teaspoonful of salt to a tumbler of water).
  • Rest is important for two weeks after a tonsillectomy to help recovery and the healing process. Therefore, returning to work or college and strenuous activities such as sports are best avoided. Sexual activity may be resumed when you feel able.
  • Earache is common after tonsillectomy. This will gradually get better. The pain relief medicines that you are taking will help.
  • Sneezing, blowing your nose or coughing should not cause problems. You can take a bath or shower and clean your teeth as normal.

What to watch out for


The white appearance where the tonsils used to be is normal and does not mean that you have an infection. However, if you feel very unwell, have a fever (high temperature) or your breath becomes smelly, you may have an infection.

If these develop you should contact your GP. Alternatives are to go to your hospital emergency department, use a walk- in centre for advice and treatment or, in some hospitals, you may be given an emergency number for the ENT department.


Bleeding from the throat after you have left the hospital is not normal.

If there is bleeding, with more than very slight amounts of blood, you should go straight to your nearest hospital emergency department.

Side effects, risks and benefits

Tonsillectomy is usually successful in reducing infections or relieving breathing difficulties. Your surgeon will be able to tell you how successful he/she expects the operation to be for you.

Like all medical treatments there are some side effects and risks.

  • Pain and sickness are very common after tonsillectomy.
  • About 3 out of 100 people having their tonsils out have to return to hospital because of bleeding. A few of these people need another operation to stop the bleeding.
  • Variant Creutzfeldt-Jakob disease (vCJD) is a very rare illness affecting the brain. There is a theoretical risk that instruments used in tonsillectomy could spread the disease but it has never been shown to have actually happened.
  • Serious problems due to an anaesthetic are uncommon. All operations carry a small risk of death from the combined effects of surgery and the anaesthetic. More detailed information can be found in the Anaesthesia Explained leaflet and others in this series of leaflets.

Index of side effects and complications

People vary in how they interpret words and numbers. This scale is provided to help:

Very commonCommonUncommonRareVery rare
1 in 101 in 1001 in 1,0001 in 10,0001 in 100,000
  • If something is very common, this means that about one in 10 will experience it.
  • Common means about one in 100.
  • Uncommon means about one in 1000.
  • Rare means about one in 10,000.
  • Very rare means about one in 100,000.

It is up to you to decide whether to have the operation. Everyone varies in the risks they are willing to take. Your surgeon and anaesthetist will be able to talk to you about your individual risks.

Questions you may like to ask your anaesthetist

  • Who will give my anaesthetic?
  • What type of anaesthetic do you recommend?
  • Have you often used this type of anaesthetic?
  • What are the risks of this type of anaesthetic?
  • Do I have any special risks?
  • How will I feel afterwards?
  • Do I need to make any special arrangements at home?

Useful organisations

Association of Anaesthetists of Great Britain and Ireland

21 Portland Place
London W1B 1PY
Phone: +44 20 7631 1650
Fax: +44 20 7631 4352
This organisation works to promote the development of anaesthesia and the welfare of anaesthetists and their patients in Great Britain and Ireland.

Royal College of Anaesthetists

Churchill House
35 Red Lion Square
London, WC1R 4SG
Phone: + 44 20 7092 1500
Fax: + 44 20 7092 1730
This organisation is responsible for standards in anaesthesia, critical care and pain management throughout the UK.

The British Association of Otorhinolaryngologists – Head and Neck Surgeons

c/o The Royal Colleges of Surgeons England
35–43 Lincoln’s Inn Fields
London WC2A 3PE
Tel: 020 7404 8373 Fax: 020 7404 4200 Website:
The organisation of Ear Nose and Throat (ENT) surgeons in the UK

This guide was written by The Royal College of Anaesthetists, Churchill House, 35 Red Lion Square, London WC1R 4SG.
© 2002, RCoA (3rd edition - May 2008). Copyright for this article is with the Royal College of Anaesthetists.