---
title: "Measles: Symptoms, Causes & NHS Treatment | HealthAnswers"
description: "Measles — symptoms, highly contagious spread, MMR vaccine, complications, and when to seek urgent medical help."
url: https://healthanswers.co.uk/conditions/measles/
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---

# Measles: Symptoms, Causes & NHS Treatment | HealthAnswers

Health A–Z

Measles — symptoms, highly contagious spread, MMR vaccine, complications, and when to seek urgent medical help.

Written by HealthAnswers editorial team Medically reviewed by [HealthAnswers UK doctor review panel](https://healthanswers.co.uk/our-doctors/) Reviewed 3 July 2026

## Quick answer

What is measles? Measles is a highly contagious viral illness causing fever, cough, red eyes, and a distinctive red-brown rash that spreads from face downward. Most common in unvaccinated children but can affect adults severely. MMR vaccine provides excellent protection — two doses in childhood. Complications include pneumonia and encephalitis — rare but serious. Phone GP before visiting if suspected — isolate to protect others.

General UK health information, not a diagnosis. In an emergency call 999 ; for urgent advice use [NHS 111](https://111.nhs.uk/) (GP out-of-hours in Northern Ireland).

On this page 9 sections

## Key facts about measles

- Measles spreads through coughs and sneezes — infects about 90% of unvaccinated close contacts.
- Koplik spots — small white spots inside cheeks — appear before rash and help diagnosis.
- MMR vaccine at 12 months and 3 years 4 months — catch-up vaccination available for unvaccinated.
- Pregnant women without immunity are at risk — measles in pregnancy can harm the baby.
- One in 15 children develop complications — pneumonia most common serious one in UK.

## Measles — not a harmless childhood rash

**Measles** is one of the **most contagious** human diseases — a **single case** can infect **9 out of 10 unvaccinated** people in close contact. Before vaccination, it killed millions globally; **MMR vaccine** reduced UK cases dramatically — but **outbreaks resurge** where vaccination rates fall.

It is **not trivial** — **1 in 15** affected children in the UK develop **serious complications**.

## Symptoms — typical timeline

**Day 1 to 3 — prodrome:**

- high [fever](https://healthanswers.co.uk/symptoms/high-temperature/) (often 40°C+)

- [runny nose](https://healthanswers.co.uk/symptoms/runny-nose/) , cough

- red, watery eyes ([conjunctivitis](https://healthanswers.co.uk/conditions/conjunctivitis/))

- general malaise

**Koplik spots** — **tiny white/grey spots on buccal mucosa** (inside cheeks) — **pathognomonic**, fade as rash appears.

**Day 3 to 7 — rash:**

- red-brown maculopapular rash

- starts behind ears and hairline , spreads face → chest → limbs

- blanches on pressure (unlike meningococcal rash)

- fades in order of appearance over 5 to 6 days — may brownish desquamation

## How it spreads

**Respiratory droplets** — [cough](https://healthanswers.co.uk/symptoms/cough/), sneeze, breathing shared air.

**Virus survives** in airspace up to **2 hours** after infected person leaves room.

**Incubation:** **10 to 12 days** to first symptoms; **14 days** to rash.

## Who is at risk

- unvaccinated children and adults

- infants too young for vaccine (<12 months)

- immunocompromised — cannot receive live vaccine; rely on herd immunity

- pregnant women without immunity — [miscarriage](https://healthanswers.co.uk/conditions/miscarriage/), prematurity, low birth weight risk

## MMR vaccination

**Schedule UK:**

- 1 year — MMR dose 1

- 3 years 4 months — MMR dose 2

**Catch-up:** anyone missing doses — GP practice or sexual health for adults.

**Contraindications to live MMR:**

- pregnancy — avoid pregnancy 1 month after

- severe immunosuppression

- anaphylaxis to neomycin or gelatine (rare)

## Treatment — supportive

- [paracetamol](https://healthanswers.co.uk/treatments/paracetamol/)/ibuprofen — fever, discomfort

- fluids — prevent dehydration

- rest

- no school/work — isolation period

- vitamin A — WHO recommendation in severe measles in deficiency settings — hospital

**[Antibiotics](https://healthanswers.co.uk/treatments/antibiotics/)** — only for **secondary bacterial infection**.

## Complications

| Complication | Notes |
| --- | --- |
| Otitis media | Common |
| Pneumonia | Leading cause of measles death |
| Diarrhoea | Dehydration risk |
| Encephalitis | 1 in 1000 — brain injury/death |
| SSPE | Years later — fatal — very rare |

## Measles vs other rashes

| | Measles | Scarlet fever | Meningitis |
| --- | --- | --- | --- |
| Rash | Head down, blanching | Sandpaper, scarlet | Non-blanching petechiae |
| Prodrome | Cough, conjunctivitis | Sore throat | Rapid collapse possible |

See [scarlet fever](https://healthanswers.co.uk/conditions/scarlet-fever/) guide.

## Public health

**Notify** — measles is **notifiable** — labs and clinicians report cases.

**Contact tracing** — unvaccinated contacts may receive **MMR within 72 hours** post-exposure or **immunoglobulin** if vulnerable.

**Phone ahead** before GP visit — **do not sit in waiting room** with measles.

Measles is **almost entirely preventable** with **two MMR doses** — resurgence reflects **vaccine gaps**, not virus weakening. If unvaccinated — **catch up today**.

## ! When to see a GP about measles

Phone GP before visiting if you suspect measles — surgery may arrange isolation. Seek urgent help for breathing difficulty, drowsiness, confusion, severe headache, or rash not fading when pressed (non-blanching) with fever — exclude meningitis. Unvaccinated contacts of confirmed measles should seek public health advice promptly.

## Common questions about measles

What are the first signs of measles? High fever, runny nose, cough, red sore eyes (conjunctivitis), and small grey-white Koplik spots on inside of cheeks — rash follows 2 to 4 days later starting on face and spreading downward over 3 to 4 days. How long is measles contagious? From 4 days before rash appears until 4 days after rash onset — roughly 8 days total. Stay home from school, work, and public places during this period. Highly contagious to unvaccinated people in same room. Can adults get measles? Yes — often more severe than children — higher hospitalisation and complication rates. Adults born before 1970 may have natural immunity; those without two MMR doses or confirmed immunity should vaccinate if not pregnant or immunosuppressed. Is there a treatment for measles? No specific antiviral — supportive care with paracetamol or ibuprofen, fluids, rest. Vitamin A given in some severe cases in hospital — deficiency worsens outcomes. Antibiotics only if bacterial complication like pneumonia develops. How effective is the MMR vaccine? One dose protects about 93% — two doses about 97%. MMR also covers mumps and rubella. Safe for most people — myths linking MMR to autism disproved repeatedly by large studies. What complications can measles cause? Ear infection, pneumonia, diarrhoea, fits (febrile convulsions), encephalitis (brain inflammation — rare, can be fatal or cause brain damage), subacute sclerosing panencephalitis (very rare late complication years later).

## Sources

- [NHS — Measles](https://www.nhs.uk/conditions/measles/)
- [UKHSA — Measles guidance](https://www.gov.uk/government/collections/measles-guidance-data-and-analysis)

## How we reviewed this page

Medically reviewed by the [HealthAnswers UK doctor review panel](https://healthanswers.co.uk/our-doctors/)

First published 14 June 2026 Medically reviewed 3 July 2026 Next review due 3 July 2029 or sooner if NHS or NICE guidance changes

Written by HealthAnswers editorial team. Published by HealthAnswers (Elite Digital AI Solutions Ltd). [How we review content](https://healthanswers.co.uk/about/how-we-review/) · [Report a problem with this page](mailto:corrections@healthanswers.co.uk?subject=Problem%20with%3A%20Measles&body=Page%3A%20https%3A%2F%2Fhealthanswers.co.uk%2Fconditions%2Fmeasles%2F%0A%0AWhat%20looks%20wrong%20or%20out%20of%20date%3A%0A)