Baby teething: signs to watch for and what actually helps
If your baby is suddenly drooling, chewing everything, and waking more at night — teething is a likely cause. The short, honest answer:
- first tooth usually appears between 4 and 7 months (some babies wait until 12 — still normal)
- real signs: heavy drooling, chewing, gum rubbing, mild fussiness, slightly poor sleep for 2–5 days around the tooth
- fever above 38 °C, diarrhea, vomiting, or rash are NOT caused by teething
- safe comfort: chilled (not frozen) teether, cool washcloth, gum massage with a clean finger
- safer pain relief: weight-based paracetamol only when truly miserable and pediatrician-cleared
Not every fussy week is teething — much of what gets blamed on it has another cause. Everything below is built on top of the list above.
Quick reference: baby teething at a glance
| What | When | Quick tip |
|---|---|---|
| First tooth (lower incisors) | 4–7 months (range 3–12) | Drool + chewing is the giveaway, not a fever |
| Upper incisors | 8–12 months | Two tiny white dots, hardest part is night sleep |
| First molars | 13–19 months | Bigger tooth = bigger fuss for a few days |
| Canines | 16–22 months | Sharp pain spike — comfort + cool not heat |
| Second molars | 23–33 months | Final wave; daytime mood often suffers more than sleep |
| Disrupted nights | Each tooth | Typically 2–5 nights, not weeks |
When do babies start teething?
Most babies cut their first tooth between 4 and 7 months, with the lower middle incisors arriving first. But this is a range, not a deadline: some babies have a tooth at 3 months, others wait until their first birthday. Both are normal as long as a tooth eventually appears by around 18 months (AAP HealthyChildren).
A late first tooth is rarely a problem on its own. If you're tracking development more broadly, our guide on when babies hit which milestone is useful for keeping perspective: late doesn't mean delayed.
What are the real signs of teething?
These are the symptoms research actually links to teething — the rest is myth or coincidence.
- Heavy drooling, often soaking the bib in an hour
- Chewing or biting on everything — fists, fingers, toys, your shoulder
- Gum rubbing — pressing the gums against a fist or toy
- Mild irritability and clinginess for 2–5 days around the tooth breaking through
- Slight gum redness or swelling where the tooth is about to come through
- Mildly disrupted sleep for a few nights
UK's National Health Service lists these as the typical symptoms, and adds that babies may flush on one cheek and have a slightly raised temperature below 38 °C (NHS — Baby teething symptoms).
If your baby is suddenly waking far more at night and you're not sure it's teething alone, see why your baby is waking more at night — there are several other causes that can pile up at the same age.
What is NOT caused by teething (the fever myth)
This is the part most parents get told wrong:
- High fever (≥ 38 °C / 100.4 °F) is not from teething. A real fever in a baby needs its own assessment.
- Diarrhea is not from teething.
- Vomiting is not from teething.
- A full-body rash is not from teething.
- Severe persistent crying is not from teething alone.
A large prospective study of healthy infants found that teething only minimally raises body temperature — never to true fever levels. Treating a feverish baby as "just teething" is one of the most common reasons illnesses get missed. If your baby is hot and miserable, treat it like a possible illness and read when to monitor and when to call the doctor for fever and cough.
What actually helps a teething baby
The things research-backed pediatric organisations recommend are simple and cheap:
- A clean, chilled (not frozen) teether or rubber ring. Cold soothes inflamed gum tissue; frozen is too hard and can bruise gums.
- A wet washcloth twisted and chilled in the fridge. Free, safe, surprisingly effective.
- Gum massage with a clean finger. Firm gentle pressure over the bumpy spot — many babies stop fussing within a minute.
- Extra contact and patience. Babies regress into needing you more during a tooth — it's not "manipulation", it's pain plus needing comfort.
- A familiar bedtime routine even on tough nights. Predictability lowers stress; see how to build a baby routine that works.
NHS recommends these comfort approaches first, before any medication (NHS — tips for helping your teething baby).
Pain relief: what's safe and when
Most teething does not need medication. For the few hours or one night where your baby is truly miserable, weight-based paracetamol (acetaminophen) or, if over 6 months, ibuprofen is acceptable — but only if cleared by your pediatrician and dosed by weight, not age.
A Cochrane review on paracetamol for teething pain concluded that while it can reduce pain for a short window, the evidence is limited and routine use is not recommended (Cochrane — Paracetamol for teething pain). In plain English: it's a tool for a hard hour, not a daily habit.
What to avoid (some are dangerous, not just useless)
- Amber teething necklaces and bracelets. Strangulation and choking risk; no proven benefit. The AAP and FDA have explicit warnings (AAP — Teething jewelry FDA warning).
- Benzocaine gels (Orajel, Anbesol). FDA warns against their use in infants under 2 — risk of methemoglobinemia, a rare but serious blood condition (FDA — Safely Soothing Teething Pain).
- Homeopathic teething tablets (especially older formulas with belladonna). FDA recalled several brands; avoid.
- Whiskey, brandy, or any alcohol on the gums. Toxic to infants. Common older advice; never safe.
- Frozen teethers or food. Too hard, can bruise tender gums.
Teething and sleep
Teething does disrupt sleep — but usually for 2 to 5 nights around a tooth breaking through, not for weeks.
If your baby is waking many times every night for more than a week, look for another cause before blaming the next tooth. The honest tally: by 12 months most babies have 6 to 8 teeth, but they don't get them in continuous waves. If "teething" has been your explanation for 6 weeks straight, it's probably something else — overtiredness, a developmental leap, a routine change. Signs your baby is overtired covers the most common look-alike.
When to call the pediatrician
Call your pediatrician if:
- fever above 38 °C / 100.4 °F that doesn't have an obvious teething explanation (and remember, teething doesn't cause true fever)
- crying that is inconsolable or feels different from your baby's normal upset
- refusing all feeds (breast, bottle, or solids) for more than half a day
- diarrhea or vomiting
- a rash beyond the chin (drool rash on chin is normal — full-body rash is not)
- you just have a gut feeling something else is going on
Trust the gut. Pediatricians prefer a "false alarm" call to a missed early illness.
Frequently asked questions
Can teething cause a fever?
A slight bump in temperature (below 38 °C) is possible. A true fever above 38 °C is not caused by teething alone — assume illness and check with your pediatrician.
My baby is 10 months with no teeth — should I worry?
Usually no. The normal range stretches to 12 months and sometimes beyond. If no tooth has appeared by 18 months, mention it at your next well-child visit.
Does teething cause diarrhea?
No. Increased drool can mildly loosen stools, but actual diarrhea has another cause and shouldn't be dismissed.
Are amber necklaces safe?
No. They are a choking and strangulation hazard with no proven benefit. AAP and FDA recommend against them.
How long does each tooth take to come through?
The hardest part is typically 2–5 days as the tooth breaks through the gum. The full eruption process can stretch over weeks but the pain peaks briefly.
Is it OK to give pain relief at night?
Occasionally, yes — only if your pediatrician has approved weight-based dosing for your specific baby. Not a nightly habit.
How KidyGrow can help
KidyGrow learns your baby as you log — feeds, naps, mood, fussiness, illness — and connects the dots in a way a static chart can't. When teething hits, you'll usually see it in the data before you fully clock it: a cluster of fussy moments, a missed nap, an extra night waking. The Daily Brief flags those patterns so you're not guessing whether it's "the tooth" or something else.
It remembers the small notes you'd otherwise forget — that your daughter chewed her left hand for two days before her last tooth, or that solid food refusal usually means a top tooth is on the way. The Daily Brief is personalized to what's actually happening this week for this baby, not a generic week-by-week chart. Calibration takes 3–5 days of regular logging; the longer you use it, the sharper the pattern.
For more on how the personalization actually works under the hood, see behind the scenes: how KidyGrow learns your baby.
_Disclaimer: Educational only, not medical advice. For dosing, fever, or any concern about your baby, call your pediatrician._
Sources
- AAP HealthyChildren — Baby's First Tooth: Facts Parents Should Know (accessed 2026).
- AAP HealthyChildren — Teething Pain (accessed 2026).
- NHS — Baby teething symptoms (accessed 2026).
- NHS — Tips for helping your teething baby (accessed 2026).
- Cochrane — Paracetamol for pain management in teething children (accessed 2026).
- FDA — Safely Soothing Teething Pain and Sensory Needs in Babies and Older Children (accessed 2026).
- AAP — Teething jewelry: FDA warning (accessed 2026).
- KidsHealth — Teething (accessed 2026).