sudden tonsil

Overview

Sudden tonsil pain and swelling usually means acute tonsillitis. That is when your tonsils — the two soft lumps at the back of your throat — become infected and inflame. This infection can be caused by a virus or, less often, by bacteria. It can make your throat very sore and make it hard to swallow.

Yes, it is very common – especially in children and young adults. Most people will have at least one episode of tonsillitis during their life.

It can affect anyone, but it is most common in school-age children and teenagers. It also tends to be more common in people who are in close contact with others, such as in schools, nurseries, or shared homes.

Symptoms

Common symptoms

• Sore throat that comes on quickly
• Pain when you swallow
• Red, swollen tonsils
• White patches or coating on your tonsils
• Enlarged, tender glands in your neck
• Fever or high temperature
• Bad breath

Symptoms in children

• Poor appetite and refusing food or drink
• Fussiness or irritability
• Drooling more than usual
• Complaining of a stopped-up or hoarse voice
• Feeling tired and sleepy

Symptoms in older adults

• Some older adults may have a milder sore throat but still feel generally unwell
• Fever and body aches can also occur
• It is important for older adults to drink fluids and see a doctor if symptoms last more than a few days

Causes

Main causes

• Viral infections – the same viruses that cause the common cold, flu, or a hoarse voice
• Bacterial infections – especially Streptococcus (strep) bacteria, which cause ‘strep throat’
• Rarely, a fungal infection or a foreign body irritating the tonsils

Risk factors

• Being between the ages of 5 and 15
• Spending time in crowded places, like schools or dorms
• Being in close contact with someone who already has a sore throat or infection
• Having a weakened immune system
• Smoking or being exposed to second-hand smoke

When to see a doctor

See a doctor urgently if:

• If you have any of the emergency symptoms above (trouble breathing, drooling, muffled voice, severe swelling) — call your local emergency number or go to an emergency department now.
• If you have a condition that weakens your immune system and you develop a sore throat, call your doctor the same day.
• If you are an adult and your throat is so painful that you cannot drink fluids, you should be seen urgently.

Book a routine appointment if:

• If your sore throat lasts more than 2 to 3 days without improving.
• If you have a high fever that does not come down with over-the-counter pain relievers.
• If you notice pus or white patches on your tonsils and you also have a fever or feeling very unwell.
• If you have had several episodes of tonsillitis in the last year (your doctor can discuss whether this is a problem for you).

Diagnosis

A doctor will ask about your symptoms and look at your throat and tonsils. They will also feel the sides of your neck to check for swollen glands. Usually, that is enough to tell whether your tonsils are inflamed and infected.

Tests that may be done

• A throat swab – a soft cotton bud is wiped on the back of your throat to check for bacteria. This is not always done, and results may take a few minutes or a few days.
• A blood test – this is not routine but might be done if you have a higher risk of complications or if a more serious infection is suspected.
• A rapid strep test – in some quick clinics, this can show within minutes whether strep bacteria are present.

What to expect at your appointment

The examination is quick and usually painless, though it may make you gag a little. The doctor may also look in your ears and nose, and listen to your chest to rule out other causes. You will likely know whether it is viral or bacterial within a day or two, and the doctor will give you advice based on that.

Treatment

Treatment depends on what is causing the infection and how severe it is. For viral tonsillitis, the body fights off the infection on its own. For bacterial tonsillitis, a short course of antibiotics may be prescribed – but not everyone needs them. You can manage most symptoms at home.

Self-care at home

• Rest and get plenty of sleep
• Drink cool or warm fluids often – water, clear soup, or an oral rehydration drink if you feel weak
• Suck on ice chips or lozenges (for adults and children over 5 years) to soothe the throat
• Gargle with warm salty water (for older children and adults) – take care not to swallow it
• Use a humidifier or breathe in steam from a hot shower to keep the air moist
• Take over-the-counter pain relief like paracetamol or ibuprofen, but always follow the package instructions and check with a pharmacist if you have health conditions

Medical treatments

If a bacterial infection is confirmed, a doctor may prescribe an antibiotic. It is important to take the full course exactly as prescribed, even if you feel better quickly. In some cases, a single steroid medicine may be used to reduce swelling, but only under a doctor’s supervision. You do not need antibiotics for a viral infection, and taking them when not needed can do more harm than good.

When is surgery considered?

Surgery to remove the tonsils (a tonsillectomy) is not usually done for a first episode. It is only considered if someone has very frequent and severe tonsillitis (for example, at least 7 episodes in one year, 5–6 episodes in two years, or 3–4 episodes in three years), or if a throat abscess keeps coming back. Your ENT specialist (ear, nose, and throat doctor) will discuss the benefits and risks with you before any surgery is planned.

Living with this condition

You may feel unwell for a few days. Drink little and often, even if it hurts, because staying hydrated helps your throat and your overall recovery. Try to rest until your fever goes away and you feel better. You can normally return to work or school after about a week, depending on how you feel. Gargling and drinking warm fluids can help make the day more comfortable.

Lifestyle tips

• Avoid smoking and second-hand smoke – smoke irritates the throat and slows healing
• Avoid alcohol during the worst part of the infection, as it can dry your throat and interfere with rest
• Wash your hands regularly and do not share cups, cutlery, or toothbrushes with others while you are unwell
• If you have a fever, keep yourself cool by wearing light clothing and using a fan if it is hot

Diet and exercise

You do not need to exercise during an acute infection – rest is more important. Once you feel better, you can gradually return to your normal routine. For your throat, soft foods like porridge, mashed potatoes, soup, or yogurt are easier to swallow. Avoid crunchy, spicy, or very acidic foods until the pain settles. Drink at least 8–10 glasses of fluid a day, and more if you have a fever.

Mental health and emotional wellbeing

A painful throat and feeling unwell can make you frustrated, anxious, or low. If you are isolated at home, try to keep in touch with friends or family by phone or video. If you have been prescribed medicine, take it as directed and be patient with your recovery. If you are struggling with low mood that lasts after you recover, speak to a healthcare professional.

Prevention

You cannot always prevent tonsillitis, but you can reduce your risk. The most important steps are good hand hygiene, avoiding sharing eating utensils or drinking glasses, and staying away from people who have a contagious sore throat or cold. Keeping your immune system strong with a balanced diet and enough rest also helps.

Vaccines

There is no specific vaccine for tonsillitis. However, vaccines against flu and COVID-19 can reduce your risk of viral illnesses that may lead to a sore throat and tonsillitis. Follow the vaccination advice for your local area.

Screening programmes

There is no routine screening for tonsillitis. If you have repeated severe episodes, your doctor may do a throat swab or refer you to an ENT specialist to check for problems, but this is not a screening test for the general public.

Complications

If left untreated

• A peritonsillar abscess – a collection of pus near one tonsil, which can cause severe pain, difficulty opening your mouth, and a muffled voice
• Spread of infection to other parts of the throat or neck
• Rarely, rheumatic fever or inflammation of the kidneys after a bacterial strep infection
• Dehydration if you cannot drink enough fluids

Long-term outlook

The outlook is very good. Most tonsil infections are viral and get better within 5 to 7 days without any special treatment. Even bacterial tonsillitis usually clears up fully with the right care. Rare complications are treatable, especially when you seek medical help early. If you or your child recovers properly and stays well hydrated, you can expect to return to normal activities in about a week.

Find support

International organisations

• NHS (UK) – Tonsillitis information ↗

Local organisations

• Your local general practice or community clinic · International

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