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Children's health

Mumps in children: swollen cheeks, complications and staying off school

Mumps is a viral infection that causes painful swelling at the sides of the face. It usually clears within two weeks but occasionally causes complications, which are more likely in teenagers and adults. This guide covers how it looks, how to ease it at home, which symptoms need urgent attention and how long a child should stay off nursery or school.

Last checked: 2026-10-04

Key facts

At a glance.

  • Main sign

    The NHS describes painful swelling around the cheeks and neck that gets worse over a few days, often starting on one side and then both.

  • Duration

    The NHS says mumps usually gets better without treatment within 2 weeks; NHS inform says 1 or 2 weeks.

  • Time away

    The NHS and UKHSA say to stay off school or nursery for at least 5 days after the swelling starts.

  • Incubation

    NHS inform says symptoms usually develop 14 to 25 days after infection.

  • Warning signs

    The NHS says tummy or back pain, or painful swollen testicles, need an urgent GP appointment or NHS 111; a very bad headache, vomiting, stiff neck or fit need A&E or 999.

What mumps looks and feels like

The main symptom is painful swelling of the cheeks and neck, which may cause earache or make chewing, swallowing or speaking harder. NHS inform describes swelling of the parotid glands at the sides of the face under the ears, giving a distinctive hamster-face appearance. The NHS says the swelling usually starts on one side before appearing on both, and that sometimes only one side swells or there is no swelling at all.

Other symptoms include headache, high temperature (38C or above, says NHS inform), muscle or joint aches, tiredness, feeling sick, a dry mouth, mild stomach pain and loss of appetite. These can begin a few days before the swelling. It is also possible to have mumps without any symptoms.

Speaking to the GP and how mumps is confirmed

The NHS says to speak to a GP if you think a child may have mumps, or if a person has been in close contact with someone with mumps and has not had 2 doses of MMR or had mumps before, and that the GP will arrange a test. Mumps spreads easily, so phone first. NHS inform notes that mumps has similar symptoms to glandular fever and tonsillitis, and that a GP who suspects it should notify the local health protection team. It says a GP can usually diagnose by seeing and feeling the swelling, looking at the position of the tonsils and checking temperature.

Home care

The NHS and NHS inform suggest the following once a GP has seen the child.

  • Rest and drink plenty of water.

  • Paracetamol or ibuprofen for swelling, aches and pain; no aspirin for children under 16.

  • A warm towel held gently against the cheeks and neck (NHS), or a warm or cool compress on the swollen glands (NHS inform).

  • Foods that need little chewing, such as soup, mashed potatoes and scrambled eggs (NHS inform).

Complications

The NHS lists swollen testicles (orchitis), swollen ovaries, meningitis, pancreatitis and temporary hearing loss in one ear, and says these are more likely when mumps occurs as a teenager or adult but usually do not cause serious long-term problems. NHS inform says about 1 in 20 cases lead to acute pancreatitis, usually mild, and about 1 in 20 people experience some temporary hearing loss, with permanent loss rare. It says mumps can lead to viral meningitis if the virus moves into the outer layer of the brain, and that swelling of the testicles or ovaries mainly affects those who have gone through puberty.

Urgent and emergency signs

The NHS says to ask for an urgent GP appointment or get help from NHS 111 if a person with mumps has tummy or back pain, or painful or swollen testicles. It says to go to A&E or call 999 if a person with mumps has a very bad headache, is being sick, has a stiff neck, dislikes bright light, is confused or disoriented, has a fit or seizure, or passes out.

Spread, nursery and school

Mumps is caused by a virus that spreads when an infected person coughs or sneezes. NHS inform says a person is most contagious a few days before symptoms develop and for a few days afterwards. UKHSA says infected people should stay away from the setting until 5 days after onset of swelling, and that settings only need to contact the health protection team if there is an outbreak. The NHS gives the same 5 days and advises staying at home, washing hands often, using tissues and not sharing towels, bedding, clothes, cups or cutlery.

Vaccination

NHS inform says mumps used to be common in children before the MMR vaccine, which is given in 2 doses as part of the NHS childhood programme, and that most cases occur in people aged 17 to 34 who have not had 2 doses. The NHS says MMRV is offered to all young children in the UK, MMR is recommended for adults and older children who were not vaccinated, and it is very unlikely to be mumps if someone has had both doses or has had mumps before.

Frequently asked

Questions people ask.

Quick, plain-English answers to the questions we hear most.

  • How long should my child stay off school with mumps?

    The NHS and UKHSA say at least 5 days after the swelling starts. NHS inform says at least 5 days after symptoms first develop.

  • Can a child who has had MMR get mumps?

    The NHS says it is very unlikely to be mumps if someone has had both doses of the MMRV or MMR vaccine. The sources read do not give a figure for protection.

  • Does mumps always cause swelling?

    No. The NHS says sometimes you only get swelling on one side or no swelling at all, and NHS inform notes that sometimes mumps causes no noticeable symptoms.

  • What are the complications for boys?

    The NHS lists swollen testicles (orchitis) and says to seek an urgent GP appointment or NHS 111 for painful or swollen testicles. NHS inform says this mainly affects people who have gone through puberty.

  • Is mumps the same as glandular fever?

    No, but NHS inform says mumps has similar symptoms to more serious types of infection such as glandular fever and tonsillitis, which is why a GP assessment helps.

  • Does the GP need to notify anyone?

    NHS inform says a GP who suspects mumps should notify the local health protection team. UKHSA says settings only need to contact the team if there is an outbreak.

  • Can adults catch mumps from children?

    Yes. NHS inform says it spreads through droplets and that most cases occur in people aged 17 to 34 who have not had 2 doses of MMR. The NHS says complications are more likely in teenagers and adults.

  • What painkillers are suitable?

    The NHS lists paracetamol or ibuprofen for swelling, aches and pain and says not to give aspirin to children under 16. Check the leaflet for the child's age.

  • What does a pregnant woman exposed to mumps do?

    NHS inform says to phone the GP if you are pregnant and have been in close contact with someone who has mumps and are not fully vaccinated.

  • Can mumps cause hearing loss?

    The NHS lists temporary hearing loss in one ear. NHS inform says about 1 in 20 experience some temporary hearing loss and permanent loss is rare.

Where this comes from

Sources and checking.

This guide is for information, not medical advice.

Your GP or consultant knows your history and can tell you which parts apply to you. If your symptoms are severe, rapidly worsening, or come with red-flag features, seek urgent medical care. Figures and availability change, so treat them as a guide and confirm with the provider.

Published 2026-10-04, next review 2027-10-04.