Cheeks and neck that become painfully swollen and get worse over a few days may be mumps. The UK National Health Service (NHS) describes mumps as an infection causing painful swelling on the cheeks and neck that usually gets better within 2 weeks but sometimes causes other problems. See a GP if you suspect it, but speak to the surgery before going in as it spreads easily, and stay off work, school or nursery for at least 5 days after the swelling starts. With 2 doses of MMR (or MMRV), or past mumps, it is very unlikely. Here is the NHS page on symptoms, self-care, complications and when to get urgent help.
1. Painful swelling of the cheeks and neck — usually starting on 1 side, worse over a few days; usually better within 2 weeks.
2. Stay home for at least 5 days after swelling starts — off work, school or nursery; don’t share towels, cups or cutlery.
3. 999 for a very bad headache, vomiting, stiff neck, dislike of light, confusion, a fit or fainting — urgent help for painful or swollen testicles.
Symptoms — NHS
| Type | What the NHS says | Worth noting (ours) |
|---|---|---|
| Swelling | Painful swelling around the cheeks and neck, worse over a few days; may cause earache or make chewing, swallowing or speaking harder | — |
| Which side | Usually starts on 1 side then both; sometimes only 1 side or no swelling at all | No swelling doesn’t rule it out (ours) |
| Other | Headache, high temperature, muscle aches, tiredness, not as hungry — may start a few days before the swelling | Can begin like a cold |
| No symptoms | You can have mumps without any symptoms | — |
| Vaccine or past infection | With both doses of MMRV or MMR, or past mumps, it’s very unlikely | It may be swollen glands from another cause |
Seeing a GP — NHS
Speak to a GP if you think you or your child may have mumps, or after close contact with someone who has it if you’ve not had 2 doses of MMR or had mumps before. The GP will arrange a test to confirm it. Because it spreads easily, speak to the surgery before going in; they may suggest a phone call. In Korea the equivalent is to phone ahead with your symptoms (our note).
Self-care — NHS
| Type | What the NHS says | Worth noting (ours) |
|---|---|---|
| Rest | Rest | — |
| Water | Plenty of water to avoid dehydration | If chewing hurts, start with what’s easy to drink (ours) |
| Medicine | Paracetamol or ibuprofen for swelling and pain; no aspirin for children under 16 | — |
| Warm towel | Gently hold a warm towel against cheeks and neck | — |
| How long | Usually better within 2 weeks without treatment | — |
Avoiding spread — NHS
Mumps is caused by a virus spread when an infected person coughs or sneezes. Stay home and avoid others while ill, wash hands often with soap and warm water, use tissues and bin them, and don’t share towels, bedding, clothes, cups or cutlery. Stay off work or keep children out of school or nursery for at least 5 days after the swelling starts.
Complications and urgent help — NHS
Most people get better within 2 weeks, but mumps can cause swollen testicles (orchitis), swollen ovaries, meningitis, pancreatitis and temporary hearing loss in 1 ear. These are more likely in teenagers and adults but usually don’t cause serious long-term problems, says the NHS. The urgent criteria are set out in the 3 rows below (our summary).
| If | Where | Worth noting (ours) |
|---|---|---|
| Mumps with tummy or back pain, or painful or swollen testicles | Urgent GP appointment or NHS 111 (online for ages 5 and over) | Same-day care in Korea |
| Mumps with a very bad headache, vomiting, stiff neck, dislike of bright light | A&E or 999 | Reads as signs of meningitis (ours) |
| Confused or disoriented, a fit or seizure, fainting | A&E or 999 | Don’t drive yourself; bring your medicines |
Vaccination — NHS
The MMRV and MMR vaccines help prevent mumps; both also protect against measles and rubella, and MMRV against chickenpox too. The UK offers MMRV to all young children and MMR to adults and older children not vaccinated when younger; ask your GP if unsure. See also measles and chickenpox, which the same vaccines cover.
Checklist
- ☐ Painful cheek and neck swelling getting worse over days?
- ☐ Check 2 MMR doses or past mumps
- ☐ Phone the surgery before going in
- ☐ Stay off work or school for at least 5 days after swelling starts
- ☐ Testicle or tummy pain: urgent help; bad headache, stiff neck or a fit: 999
Questions that remain
What is the incubation period?
The page doesn’t give the time from infection to symptoms; it only says other symptoms may start a few days before the swelling.
Can you get it after the vaccine?
The NHS says it’s “very unlikely” after both doses, not impossible.
Sources
- NHS — Mumps — source (page shows: reviewed 9 July 2025, next review due 9 July 2028; checked 28 October 2026). Symptoms (swelling, 1 side first, headache, temperature, no symptoms), vaccine and past infection, GP and testing, self-care, avoiding spread, at least 5 days off, 5 complications, 111 and 999 criteria, MMRV and MMR.
- Not read. The MMRV and MMR vaccine pages; the Korean schedule.
- What we added. The “worth noting” column and the Korean care gloss.
Where to check further
- A paediatrician or GP-type clinic — phone ahead with symptoms.
- Urology — for painful, swollen testicles.
Written on 28 October 2026. The content is from the NHS; the glosses are ours.
