What does a fever in a child with no other symptoms mean?
Applies to age: 0–36 months
In short
A fever is 38°C or more and usually passes within 1 to 4 days. Among other things, a fever lasting 5 days or longer, or a child who is not themselves while the parent is worried, needs an urgent medical assessment.
What is normal
All claims: international norm
- A high temperature (fever) is very common in young children.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
A high temperature (fever) is very common in young children.
NHS · open the source · accessed: 2026-10-16 · license [1]
- A high temperature (fever) in children is defined as 38°C or more.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
A high temperature is 38C or more.
NHS · open the source · accessed: 2026-10-16 · license [1]
- A high temperature usually returns to normal within 1 to 4 days.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
The temperature usually returns to normal within 1 to 4 days.
NHS · open the source · accessed: 2026-10-16 · license [1]
- A high temperature is the body's natural response to fighting infections, such as coughs and colds.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
A high temperature is the body's natural response to fighting infections like coughs and colds.
NHS · open the source · accessed: 2026-10-16 · license [1]
- Many things can cause a high temperature in children, from common childhood illnesses such as chickenpox and tonsillitis, to vaccinations.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
Many things can cause a high temperature in children, from common childhood illnesses like chickenpox and tonsillitis, to vaccinations.
NHS · open the source · accessed: 2026-10-16 · license [1]
- A child or baby with a high temperature can usually be looked after at home.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
If your child or baby has a high temperature, you can usually look after them at home.
NHS · open the source · accessed: 2026-10-16 · license [1]
ER / 112 (Poland)
Some claims: international norm
Immediate medical help needed: international norm
- Drowsiness and difficulty waking in a child with a high temperature need immediate medical help.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
is drowsy and hard to wake
NHS · open the source · accessed: 2026-10-16 · license [1]
- A stiff neck in a child with a high temperature needs immediate medical help.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
has a stiff neck
NHS · open the source · accessed: 2026-10-16 · license [1]
- A rash that does not fade when a glass is pressed against it, in a child with a high temperature, needs immediate medical help.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
has a rash that does not fade when you press a glass against it
NHS · open the source · accessed: 2026-10-16 · license [1]
- Difficulty breathing, breathlessness or very fast breathing in a child with a high temperature need immediate medical help.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
has difficulty breathing (you may notice grunting noises or their stomach sucking under their ribcage), breathlessness or breathing very fast
NHS · open the source · accessed: 2026-10-16 · license [1]
- A first febrile seizure (the child cannot stop shaking) needs immediate medical help.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
has a fit (febrile seizure) for the first time (they cannot stop shaking)
NHS · open the source · accessed: 2026-10-16 · license [1]
- An ambulance is called, among other things, for a very high fever with seizures or with symptoms that do not usually occur in that person during a fever.
Source: Portal Pacjenta – show the quote
Verbatim quote from the source:
Polish original
bardzo wysoka gorączka z drgawkami lub objawami, które zwykle u danej osoby podczas gorączki nie występują
Portal Pacjenta · open the source · accessed: 2026-10-16 · license [2]
- Call 112 (the emergency number in Poland) or 999 (the ambulance number in Poland) when life or health is at risk.
Source: NFZ i Akademia NFZ – show the quote
Verbatim quote from the source:
Polish original
Zadzwoń na 112 lub 999, jeśli zagrożone jest życie lub zdrowie.
NFZ i Akademia NFZ · open the source · accessed: 2026-10-16 · license [3]
See a doctor
Some claims: international norm
Urgent medical assessment needed: international norm
- A high temperature that lasts 5 days or longer needs an urgent medical assessment.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
has a high temperature that's lasted for 5 days or more
NHS · open the source · accessed: 2026-10-16 · license [1]
- Other signs of illness, such as a rash, together with a high temperature need an urgent medical assessment.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
has other signs of illness, such as a rash, as well as a high temperature
NHS · open the source · accessed: 2026-10-16 · license [1]
- A child's reluctance to eat, or a child who is not themselves while the parent is worried, together with a high temperature needs an urgent medical assessment.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
does not want to eat, or is not their usual self and you're worried
NHS · open the source · accessed: 2026-10-16 · license [1]
- Dehydration (diapers that are not very wet, sunken eyes, no tears when crying) together with a high temperature needs an urgent medical assessment.
Source: NHS – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
is dehydrated – such as nappies that are not very wet, sunken eyes, and no tears when they're crying
NHS · open the source · accessed: 2026-10-16 · license [1]
- When the patient's health requires it, a visit to the family doctor takes place on the day of the request.
Source: gov.pl – show the quote
Verbatim quote from the source:
Polish original
Jeśli stan zdrowia pacjenta tego wymaga, wizyta u lekarza rodzinnego odbywa się w dniu zgłoszenia, zgodnie z harmonogramem pracy danej przychodni.
gov.pl · open the source · accessed: 2026-10-16 · license [4]
- Night and holiday care (NiŚOZ) is medical help outside the working hours of a primary care (POZ) clinic.
Source: NFZ i Akademia NFZ – show the quote
Verbatim quote from the source:
Polish original
Nocna i świąteczna opieka zdrowotna to pomoc lekarska po godzinach pracy przychodni POZ.
NFZ i Akademia NFZ · open the source · accessed: 2026-10-16 · license [3]
- When in doubt, it is better to consult a doctor.
Source: NFZ i Akademia NFZ – show the quote
Verbatim quote from the source:
Polish original
Zawsze jeśli masz wątpliwości – lepiej skonsultować się z lekarzem.
NFZ i Akademia NFZ · open the source · accessed: 2026-10-16 · license [3]
international norm “International norm” next to a section heading means its claims come from a non-Polish source, because no Polish source in our registry covers this topic. When this applies to only some of the claims, the foreign ones carry the same label next to their source.
Sources
- NHS (nhs.uk, Anglia)License: Open Government Licence v3.0. Source: NHS (nhs.uk, Anglia). Content summarized and translated by the editors; changed relative to the original. Contains public sector information licensed under the Open Government Licence v3.0. The summary is ours and is not attributed to the NHS.
- Portal Pacjenta (pacjent.gov.pl)License: CC BY 3.0 PL. Source: Portal Pacjenta (pacjent.gov.pl). Content summarized and translated by the editors; changed relative to the original.
- NFZ i Akademia NFZLicense: Treści NFZ – wykorzystanie ze wskazaniem źródła, bez obrotu komercyjnego. Source: NFZ i Akademia NFZ. Content summarized and translated by the editors; changed relative to the original.
- gov.pl – serwisy Ministerstwa Zdrowia i GISLicense: CC BY-SA 4.0. Source: gov.pl – serwisy Ministerstwa Zdrowia i GIS. Content summarized and translated by the editors; changed relative to the original.