Fever

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Fever is extremely common in children and usually suggests that your child has an infection. Your child has a fever if their temperature is over 38°C. The most accurate way of measuring your child’s temperature is with a digital thermometer.

Viral infections are far more common than bacterial infections.
Symptoms such as runny nose, cough, wheeze, sore throat, red eyes and diarrhoea are more suggestive of a viral infection than a bacterial infection. If a number of people are unwell in the same household, this also suggests a viral infection (because viral infections are easily spread).
Viral infections tend to get better on their own and do not need treatment with antibiotics. Antibiotics may actually cause side effects such as rash and diarrhoea and can increase the risk of them developing antibiotic resistance.

If your child has any of the following:

Becomes pale, mottled and feels abnormally cold to touch
Is going blue around the lips
Becomes difficult to rouse
Develops a rash that does not disappear with pressure
Has a fit, or is fretful or irritable when touched
Is under 3 months of age with a temperature of 38°C / 100.4°F or above (unless fever in the 48 hours following vaccinations and no other red or amber features)

You need urgent help.

You need urgent help go to the nearest Hospital Emergency (A&E) Department or phone 999

If your child has any of the following:

Is finding it hard to breath
Seems dehydrated (dry mouth, sunken eyes, no tears, drowsy or passing less urine than usual)
Is 3-6 months of age with a temperature above 39°C / 102.2°F (but fever is common in babies up to 2 days after they receive vaccinations)
Is not improving after 5 days
Is getting worse or if you are worried