How long does teething last, and until what age do children teethe?
Applies to age: 4–30 months
In short
Most children start teething at around 6 months of age, but some start before 4 months and some after 12 months. Most children have all their baby teeth by 2–3 years of age.
What is normal
All claims: international norm
- Most babies start teething at around 6 months of age, but others start before 4 months and some only after 12 months.
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:
Most babies start teething at around 6 months, but others start teething before they are 4 months old and some after 12 months.
NHS · open the source · accessed: 2026-10-09 · license [1]
- The first molars (back teeth) come in at around 12 months of age.
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:
first molars (back teeth) – these come through at around 12 months
NHS · open the source · accessed: 2026-10-09 · license [1]
- The canines (pointed teeth between the lateral incisors and the first molars) come in at around 18 months of age.
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:
canines (pointed teeth between the lateral incisors and the first molars) – around 18 months
NHS · open the source · accessed: 2026-10-09 · license [1]
- The second molars come in at around 24 months of age.
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:
second molars – around 24 months
NHS · open the source · accessed: 2026-10-09 · license [1]
- Most children have all their baby teeth by 2–3 years of age.
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:
Most children will have all their milk teeth by the time they are 2 to 3 years old.
NHS · open the source · accessed: 2026-10-09 · license [1]
- The emergence of baby teeth can be painless or can involve only mild symptoms lasting a few 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:
Baby teeth sometimes emerge with no pain or discomfort, or only mild symptoms that last a few days.
NHS · open the source · accessed: 2026-10-09 · license [1]
When to worry
All claims: international norm
Worth discussing with a doctor:
- If symptoms worry a parent, it is worth seeing a doctor.
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:
Get medical advice if they have any symptoms that are causing you concern.
NHS · open the source · accessed: 2026-10-09 · license [1]
ER / 112 (Poland)
- Call 112 (the emergency number in Poland) or 999 (the ambulance number in Poland) if 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: 2026-10-09 · license [2]
See a doctor
- 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: 2026-10-09 · 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.