Health condition
Recurrent fevers in children
Young children normally have many feverish illnesses a year - but fevers that recur in a strikingly regular pattern, or come with no infection to explain them, raise the question of periodic fever syndromes and deserve a systematic look.
Why trust this guide
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Editorial team
Written by our editorial team from the UK sources listed on each page.
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Sourced from guidance
Checked against current NHS and UK specialist society guidance at the time of review.
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Current for 2026
Reviewed on 2026-09-27 with the next review scheduled for 2027-09-27.
Key facts
The essentials at a glance.
The symptoms to recognise, when to seek help, which specialist to see, and what treatment usually involves.
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Normal: up to 8-12 viral infections a year in a nursery-age child, each with an obvious runny nose, cough or rash, clustered through winter
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Suspicious: fevers arriving like clockwork every 3-6 weeks, lasting 3-6 days, looking identical each time, often with mouth ulcers, sore throat or swollen glands but no cold symptoms
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A fever diary recording dates, duration and accompanying symptoms is the single most useful diagnostic tool
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Specialist: a consultant paediatrician or paediatric immunologist; PFAPA is the commonest periodic fever syndrome and is benign
Understanding the condition
What it is and what happens next.
What causes it, how it is diagnosed, and the treatment routes available in the UK.
What it is and how it feels
The child who is always ill is usually a healthy child meeting the ordinary viruses of early childhood at nursery pace - a dozen colds a year is within normal, and they blur together into what feels like permanent illness. The pattern that deserves a different level of attention is periodicity: fevers that recur at almost predictable intervals, look the same every time, arrive without catarrhal symptoms, and punctuate an otherwise completely well, thriving child. That metronomic quality points away from bad luck with infections and towards an auto-inflammatory cause.
Diagnosis and treatment routes
Assessment leans heavily on the family's fever diary, growth and development review, and examination during and between episodes, supported by blood tests taken both in an attack and in a well period to document the inflammatory signature. PFAPA syndrome dominates this territory in young children; rarer inherited periodic fever syndromes are considered when the pattern, family background or blood results suggest them, and genetic panels now make those diagnoses accessible. Crucially, red flags such as weight loss, night sweats, bone pain or progressive illness between episodes shift the investigation in a different direction entirely - so the systematic look matters. In many parts of the UK, routine NHS referrals for this kind of problem currently take 20-45+ weeks, whereas an initial appointment with a private consultant is typically available within around two weeks.
Seeing a specialist
Who to see, and how quickly you can be seen.
The specialist for this condition is usually a consultant paediatrician or paediatric immunologist. Your GP can refer you on the NHS, or you can arrange a private consultation directly.
A quiet reminder
This guide is for information, not medical advice.
Your GP knows your history and can tell you which parts apply to you. If in doubt, see them - and seek urgent care for any of the emergency symptoms described above.
Frequently asked
Common questions about Recurrent fevers in children.
Quick, plain-English answers to what people ask us most.
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What counts as recurrent fevers in children needing investigation?
Young children normally have many feverish illnesses each year, but fevers that recur in a strikingly regular pattern, or without any obvious infection to explain them, raise the question of a periodic fever syndrome and deserve a systematic look.
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What causes recurrent fevers in children?
Most recurrent fevers are simply frequent, unrelated viral infections common in young children, especially those in nursery or school. A smaller group have periodic fever syndromes, which are inflammatory conditions causing regular fever episodes without infection.
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What are periodic fever syndromes?
These are a group of conditions, some genetic, in which the immune system triggers fever and inflammation in regular cycles without an infection driving it, such as PFAPA syndrome or, more rarely, hereditary periodic fever syndromes.
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How are recurrent fevers in children investigated?
Assessment includes a detailed fever diary to establish the pattern, growth and development checks, blood tests during and between episodes, and sometimes genetic testing if a hereditary periodic fever syndrome is suspected.
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How are periodic fever syndromes treated?
Treatment depends on the specific syndrome, ranging from simple monitoring and symptom relief to specific anti-inflammatory medications, and in some cases tonsillectomy has been used for PFAPA syndrome.
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Recurrent fevers vs a single feverish illness - what's the difference?
A single feverish illness is a normal, self-limiting infection, while recurrent fevers with a regular pattern and no clear infectious cause each time point towards an inflammatory rather than infectious process.
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When should I see a doctor about recurrent fevers in a child?
See your GP if fevers recur in a clear pattern, last longer than expected, or come with poor growth or other concerning symptoms. A private paediatrician or paediatric immunologist can typically be seen within about two weeks for assessment.