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Measles starts with cold-like symptoms that develop about 10 days after becoming infected. This is followed a few days later by the measles rash.

For most people, the illness lasts around 7 to 10 days.

Initial symptoms

The initial symptoms of measles can include:

Spots in the mouth

A day or two before the rash appears, many people with measles develop small greyish-white spots in their mouth.

Not everyone with measles has these spots, but if someone has them in addition to the other symptoms listed above or a rash, it's highly likely they have the condition.

The spots will usually last for a few days.

The measles rash

The measles rash appears around 2 to 4 days after the initial symptoms and normally fades after about a week.

You'll usually feel most ill on the first or second day after the rash develops.

The rash:

When to seek medical advice

Contact a GP as soon as possible if you suspect that you or your child has measles, even if you're not completely sure.

It's best to phone before your visit, as the GP surgery may need to make arrangements to reduce the risk of spreading the infection to others.

You should also see a GP if you have been in close contact with someone who has measles and have not been fully vaccinated or haven't had the infection before, even if you do not have any symptoms yet.