Most babies cut their first tooth between 6 and 10 months of age. The first teeth to arrive are usually the two lower front teeth, called the lower central incisors. Some babies start teething as early as 3 months, and a small number are born with a tooth or get one in the first few weeks. All of these fall within the normal range.
Teething is a normal part of infant development, but the timing varies widely from child to child. This guide walks through the full timeline, what the signs of teething actually are, and what the research says about the symptoms parents most often blame on teeth.
When Do Newborns Teeth? The Complete Timeline
Teeth begin forming before birth, but they do not push through the gums until months later. The table below shows the typical window for each group of primary (baby) teeth. These are general ranges, not deadlines.
| Tooth Type | Typical Age of Eruption |
|---|---|
| Lower central incisors | 6–10 months |
| Upper central incisors | 8–12 months |
| Upper lateral incisors | 9–13 months |
| Lower lateral incisors | 10–16 months |
| First molars (upper and lower) | 13–19 months |
| Canines (upper and lower) | 16–23 months |
| Second molars (upper and lower) | 23–33 months |
By about age 3, most children have a full set of 20 primary teeth. Girls often teeth slightly earlier than boys, and there is a normal spread of several months in either direction.
One point that surprises many parents: the order matters more than the exact date. Teeth tend to arrive in a predictable sequence, and a child who is a few months behind schedule but following the usual order is usually developing normally.
What Are the First Signs a Baby Is Teething?
The most reliable sign is a visible tooth or a swollen, red gum where a tooth is about to break through. Parents often notice increased drooling and a strong urge to chew on things before they see anything.
Common signs reported by parents include:
- More drooling than usual
- Chewing on fingers, toys, or the edge of anything within reach
- Swollen or tender gums
- Fussiness, especially at night
- Mild gum rubbing or ear pulling on the same side as an emerging tooth
- A slight rise in temperature
Ear pulling is worth a note. It is often listed as a teething sign because discomfort in the gums can refer along the same nerve pathways as the ear. But persistent ear pulling, especially with fever or crying, can also signal an ear infection. If it continues, it is worth having a clinician look.
Does Teething Cause Fever, Diarrhea, or Rash?
This is where parent experience and research diverge. Many parents report fever, loose stools, and diaper rash during teething. Studies that have looked at this directly have generally found only a mild rise in temperature — typically under 100.4°F (38°C) — and little to no clear link to diarrhea or rash.
The confusion likely comes from timing. Babies start teething at the same age they begin losing the protective antibodies passed from mother during pregnancy, and the same age they start putting everything in their mouths. That combination makes minor infections and tummy troubles more common around 6 to 12 months — right when teeth are arriving.
The practical takeaway: a temperature of 100.4°F (38°C) or higher is not explained by teething. Neither is diarrhea, vomiting, or a widespread rash. Those need a clinician’s assessment.
When Should You Be Concerned About Delayed Teething?
A baby with no teeth by 12 months is on the late side but still within the range many pediatric dentists consider normal. By 18 months with no teeth at all, most clinicians will want to take a closer look.
Delayed eruption can have several causes, and most of them are not serious. Family history is a strong factor — if a parent was a late teether, the child often is too. Premature babies often teeth later relative to their birth date, though their adjusted age tends to track closer to the typical timeline.
Other factors a clinician may consider include:
- Genetics and family patterns
- Nutritional status, particularly vitamin D and overall growth
- Thyroid function
- Rare conditions affecting tooth development
No clinical guidelines currently recommend routine screening for delayed teething in an otherwise healthy child before 18 months. If you are worried before then, it is reasonable to raise it at a well-child visit.
What Actually Helps a Teething Baby?
A chilled (not frozen) teething ring, a clean cold washcloth to chew on, and gentle gum massage with a clean finger are the standard first-line approaches. These are physical comfort measures, and most parents find at least one of them helps.
For pain, the American Academy of Pediatrics supports the use of weight-appropriate doses of acetaminophen or ibuprofen for infants over 6 months. Ibuprofen is not recommended under 6 months. Dosing should always follow the product label or a clinician’s direction — never estimate a dose for an infant.
What to avoid is just as important:
- Teething gels containing benzocaine. The FDA has warned against their use in children under 2 because of a rare but serious blood condition called methemoglobinemia.
- Homeopathic teething tablets. The FDA has issued warnings about these after reports of serious harm, and their safety and effectiveness have not been established.
- Amber teething necklaces. These pose a strangulation and choking risk. No clinical evidence supports the claim that they relieve pain.
- Frozen solid teething rings. These can bruise tender gums. Chilled is enough.
- Rubbing alcohol on the gums. This is unsafe and has no place in infant care.
If a baby seems in significant pain, is not feeding well, or has a fever, that warrants a call to a clinician rather than more teething remedies.
How Should You Care for New Teeth Once They Appear?
Clean the first tooth as soon as it breaks through. A soft infant toothbrush or a clean cloth with a tiny smear of fluoride toothpaste is the standard recommendation. The amount should be no more than a grain of rice for children under 3.
Fluoride toothpaste at this small amount is considered safe even if swallowed, which is why it is preferred over fluoride-free options. The evidence for fluoride in preventing tooth decay is strong and long-standing.
The first dental visit is generally recommended by a child’s first birthday or within six months of the first tooth appearing, whichever comes first. Early visits are mostly about prevention and parent education rather than treatment.
One thing many parents do not realize: primary teeth matter for more than chewing. They hold space for adult teeth, guide speech development, and untreated decay in baby teeth can affect the permanent teeth forming underneath. Caring for them early is not just about appearances.
Frequently Asked Questions
Can a baby be born with teeth?
Yes, a small number of babies are born with one or two teeth, called natal teeth. They are uncommon but usually harmless, though a clinician should check them because some need removal if they are loose or interfere with feeding.
Is it normal for a 4-month-old to start teething?
It is on the early side but within the normal range. Most first teeth appear between 6 and 10 months, and starting a bit earlier is not a cause for concern.
How long does teething pain last per tooth?
Discomfort usually builds for a few days before a tooth breaks through and eases within a few days after. The pattern varies, and some babies show very little discomfort at all.
When should I worry if my baby has no teeth?
Most clinicians consider it worth evaluating if there are no teeth by 18 months. Between 12 and 18 months, late eruption is often just a family pattern and not a sign of a problem.
