Teething gets blamed for almost every difficult day in a baby's first year. Sleep got worse? Teething. Fussy at dinner? Teething. Random fever? Teething. The reality is more boring. Teething causes some real symptoms, but most of what gets pinned on it is actually something else: a cold, a regression, a developmental leap, or just a bad day.
What teething actually does, what it doesn't, and what helps the genuinely miserable nights:
When teeth typically arrive
There's a wide normal range. Some babies have their first tooth at 3 months. Some don't get a tooth until after their first birthday. Both are fine. The order is usually more predictable than the timing.
| Tooth | Typical age |
|---|---|
| Lower central incisors (front bottom) | 6–10 months |
| Upper central incisors (front top) | 8–12 months |
| Upper lateral incisors (next to top center) | 9–13 months |
| Lower lateral incisors | 10–16 months |
| First molars (back teeth) | 13–19 months |
| Canines (between incisors and molars) | 16–22 months |
| Second molars (very back) | 23–33 months |
Most babies have 8 teeth by their first birthday and a full set of 20 baby teeth by age 3. If your baby has no teeth at 12 months, mention it at the well visit but don't worry. It's usually nothing.
What teething actually causes
Pediatric research has narrowed teething symptoms to a fairly short list. The reliable ones:
- Increased drooling, sometimes dramatically more than usual
- Putting things in the mouth and chewing on them
- Mild gum redness or visible swelling at the eruption site
- Mild fussiness in the days right around eruption
- Some sleep disruption during active eruption
- Slightly decreased appetite for a day or two
That's most of the list. Symptoms typically peak the day before and the day a tooth pops through, and resolve quickly after.
What teething does NOT reliably cause
This is where the lore gets tricky. Many things blamed on teething have weak evidence behind them:
- High fever (over 100.4°F). Teething can cause a very slight temperature elevation, usually under 100°F. A real fever is not teething. It's an infection, and a fever in a baby under 3 months is always an emergency, teething or not.
- Diarrhea. Despite popular belief, multiple studies have not found a real link. Loose stools during teething are usually a virus, food sensitivity, or coincidence.
- Severe rash beyond the chin/mouth area. A drool rash from constant chin wetness is real. A rash on the body or face away from the drool zone is something else.
- Persistent loss of appetite. A day or two of less interest in food can happen. A week of poor eating is not teething.
- Severe, inconsolable crying for days. Teething causes mild discomfort. A baby in serious pain has another cause.
- Cough, runny nose, or congestion. That's a cold.
- Ear pulling. Babies pull their ears for many reasons (teething pain can refer to the ear, but ear infections also cause it). Persistent ear pulling with fussiness warrants a doctor visit.
The rule of thumb: if symptoms feel out of proportion to "a tooth coming in," they probably aren't teething.
What genuinely helps
A short list of things that actually reduce teething pain, in rough order of effectiveness.
1. Cold pressure on the gums
This is the single most reliable comfort. Options:
- A frozen washcloth. Wet a clean washcloth, twist it, freeze it for 30 minutes. Let baby chew. Cheap, effective, washable.
- Refrigerated (not frozen) silicone teether. Frozen-solid teethers can be too hard and cold; fridge-cold is usually the sweet spot.
- Cold spoon. A regular metal spoon, refrigerated, gently rubbed on the gums.
- Cold food (for babies eating solids). Yogurt right out of the fridge, or a frozen banana piece for older babies who can chew safely.
Avoid amber teething necklaces. They have no proven benefit and are a strangulation risk if worn on a sleeping baby.
2. Counter-pressure with a clean finger
Some babies prefer firm pressure to cold. Wash your hands, then use one knuckle to apply gentle counter-pressure to the swollen gum. Most babies respond strongly to this. It's why they chew on hard things.
3. Distraction
Pain is partly attentional. A new toy, a walk outside, a different room, holding them upright on your chest, a bath. Anything that breaks the focus on the gums helps.
4. Acetaminophen (Tylenol) at bedtime, sometimes
For genuinely bad nights, infant acetaminophen at the right dose can help. A few rules:
- Only for babies over 2 months. Anything younger needs pediatric guidance.
- Use the dose for weight, not age. The bottle has a chart.
- Use sparingly. A single dose at a hard bedtime is one thing. Daily dosing for a week isn't teething; it's something to discuss with the pediatrician. (If you note doses in Tottli, the pattern is easy to scroll back through, which is what the pediatrician will want.)
- Ibuprofen is an option for babies 6 months+ but follow the same rules.
5. A familiar and predictable bedtime routine
When teething disrupts sleep, what helps most is not changing the routine. Don't introduce a new sleep prop you'll need to undo later (rocking to sleep, hours of holding, bringing them into your bed nightly). Comfort them, soothe them, but try to keep the routine recognizable. Teething disrupts sleep for a few days, not a few months. Protect the foundation.
What to skip
A few things sold for teething that have either no evidence or active risk:
- Amber teething necklaces. Strangulation risk, no proven benefit. Don't.
- Benzocaine gels (Orajel, Anbesol). The FDA warns against them for under 2 years; risk of methemoglobinemia (a serious blood condition) outweighs any benefit.
- Homeopathic teething tablets. The FDA has issued multiple recalls due to inconsistent ingredient amounts. Skip.
- Belladonna products. Same FDA warnings. Skip.
- Frozen teethers (truly frozen, not refrigerated). Too hard. Can bruise the gums. Refrigerated is the right cold level.
- Putting alcohol on the gums. Old wives' tale. Don't.
When teething needs a doctor visit
Most teething doesn't need medical attention. A few situations do:
- A real fever (over 100.4°F rectal in a baby under 3 months, or over 102°F in an older baby, or any fever lasting more than 24 hours). That's not teething.
- Inconsolable crying for hours, multiple days in a row.
- Significant decrease in wet diapers, suggesting they're not drinking enough.
- A tooth that comes in significantly out of order (e.g., molars before incisors).
- No teeth at all by 15 months. Usually nothing, but worth mentioning.
- Bleeding gums beyond a tiny amount during eruption. Usually fine, but extensive or persistent bleeding warrants a look.
The general rule: if you're using "teething" to explain symptoms that make you genuinely worried, the answer might not be teething. Trust your gut and call.
A realistic timeline for a single tooth
Here's what an actual tooth eruption tends to look like, condensed:
- Day -3 to -1: Baby is drooling more. Some chewing. Slight fussiness. Maybe a slightly worse nap or two.
- Day 0–1: Tooth pokes through. Most uncomfortable day. Sleep may be disrupted. Cold and counter-pressure help.
- Day 1–2: Visibly visible white edge of tooth above the gum. Fussiness decreases.
- Day 3+: Almost back to normal. Tooth continues to emerge over weeks.
That's the cycle. Babies typically have a "teething week" around each tooth, then a quiet stretch until the next one. Most of the year is not active teething.
A reframe
Teething is real, but most parents over-attribute. Cold, pressure, distraction, and an occasional dose of infant acetaminophen handle the genuine teething days. A real fever, persistent diarrhea, or severe symptoms past a couple of days isn't teething; call the pediatrician. Most of the disruptive nights you blame on teething have other causes, and that's a good thing, because it means there's usually a fixable reason.