When is diarrhea in an infant dangerous, and when should you see a doctor or go to the hospital?
Applies to age: 0–12 months
In short
Worry about an infant under 12 months with diarrhea or vomiting needs an urgent medical assessment; vomit with blood or green vomit needs immediate medical help. Vomiting or diarrhea is a reason to contact night and holiday care (NiŚOZ); when life is at risk, call 112 (the emergency number in Poland) or 999 (the ambulance number in Poland).
What is normal
Some claims: international norm
- Diarrhea usually goes away within 5–7 days (in adults and children).
Source: NHS · international norm – show the original wording (EN)
Summarized and translated by the editors, not an official translation. Verbatim quote from the source, in its original wording:
diarrhoea usually stops within 5 to 7 days
NHS · open the source · accessed: 2026-10-14 · license [1]
- Night and holiday care (NiŚOZ) is medical help outside the working hours of primary care (POZ) clinics.
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: 2026-10-14 · license [2]
ER / 112 (Poland)
Some claims: international norm
Immediate medical help needed: international norm
- Vomit with blood or vomit that looks like coffee grounds 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:
vomit blood or have vomit that looks like ground coffee
NHS · open the source · accessed: 2026-10-14 · license [1]
- Yellow-green or green vomit in a child 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:
have yellow-green or green vomit (children)
NHS · open the source · accessed: 2026-10-14 · license [1]
- Sudden, severe abdominal pain 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:
have a sudden, severe tummy ache
NHS · open the source · accessed: 2026-10-14 · license [1]
- Blue, gray, pale or blotchy skin, lips or tongue 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:
have blue, grey, pale or blotchy skin, lips or tongue
NHS · open the source · accessed: 2026-10-14 · license [1]
- Severe difficulty breathing or very fast, shallow breaths 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:
are having severe difficulty breathing, or taking lots of quick, short breaths
NHS · open the source · accessed: 2026-10-14 · license [1]
- Confusion or not responding as usual 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:
are confused or not responding as usual
NHS · open the source · accessed: 2026-10-14 · license [1]
- When life or health is at risk, call 112 or 999.
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: 2026-10-14 · license [2]
- Persistent vomiting, especially with blood mixed in, or acute abdominal pain is a reason to call an emergency medical team (ZRM).
Source: NFZ i Akademia NFZ – show the quote
Verbatim quote from the source:
Polish original
Wezwij zespół ratownictwa medycznego, jeśli ktoś w Twoim otoczeniu np. stracił przytomność, ma drgawki, zaburzenia rytmu serca, rozległe oparzenia, uporczywe wymioty – zwłaszcza z domieszką krwi, odczuwa nasiloną duszność lub ostry ból brzucha.
NFZ i Akademia NFZ · open the source · accessed: 2026-10-14 · license [2]
See a doctor
Some claims: international norm
Urgent medical assessment needed: international norm
- Worry about a baby under 12 months with diarrhea or vomiting 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:
you're worried about a baby under 12 months
NHS · open the source · accessed: 2026-10-14 · license [1]
- Refusing to nurse or take a bottle during illness 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:
your child stops breast or bottle feeding while they're ill
NHS · open the source · accessed: 2026-10-14 · license [1]
- Signs of dehydration in a child under 5 years, such as fewer wet diapers, 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:
a child under 5 years has signs of dehydration, such as fewer wet nappies
NHS · open the source · accessed: 2026-10-14 · license [1]
- Continuous vomiting with no way to keep fluids down 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:
you or your child keep being sick and cannot keep fluid down
NHS · open the source · accessed: 2026-10-14 · license [1]
- Bloody diarrhea or bleeding from the anus 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:
you or your child have bloody diarrhoea or bleeding from the bottom
NHS · open the source · accessed: 2026-10-14 · license [1]
- Diarrhea lasting more than 7 days or vomiting lasting more than 2 days 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:
you or your child have diarrhoea for more than 7 days or vomiting for more than 2 days
NHS · open the source · accessed: 2026-10-14 · license [1]
- Vomiting or diarrhea, especially in children, is a reason to see the on-duty doctor at NiŚOZ.
Source: NFZ i Akademia NFZ – show the quote
Verbatim quote from the source:
Polish original
pojawią się wymioty lub biegunka (szczególnie u dzieci i seniorów).
NFZ i Akademia NFZ · open the source · accessed: 2026-10-14 · license [2]
- When symptoms get worse and you cannot wait until morning, you can go to the on-duty doctor at NiŚOZ.
Source: NFZ i Akademia NFZ – show the quote
Verbatim quote from the source:
Polish original
objawy się nasilą i nie możesz czekać do rana
NFZ i Akademia NFZ · open the source · accessed: 2026-10-14 · license [2]
- High fever or severe pain is a reason to see the on-duty doctor at NiŚOZ.
Source: NFZ i Akademia NFZ – show the quote
Verbatim quote from the source:
Polish original
masz wysoką gorączkę lub silny ból
NFZ i Akademia NFZ · open the source · accessed: 2026-10-14 · license [2]
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.
- 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.