Teething or Sleep Regression? 9 Ways to Tell

The quickest way to tell teething from a sleep regression: teething is short, lumpy and physical — a few rough nights around a tooth, with drool, chewing and a hand in the mouth — while a regression runs longer and looks like skill, not pain. Regression nights come with a kid who is wide awake, chatty, practicing something new, and cross rather than hurting. Below are the 9 tells I use, what to do tonight for each, and the symptoms that stop being a sleep question and become a phone call to your pediatrician.

The 9 ways to tell them apart

1. Count the nights. Teething trouble tends to cluster for a handful of nights around a tooth actually moving, then stop. A regression settles in for a couple of weeks or more. If night five looks exactly like night one and nothing has emerged, teething is the less likely explanation.
2. Check whether they’re awake or hurting. Pain wakes a kid suddenly and they’re hard to settle but want to be held. A regression wake-up is often cheerful — talking, standing, singing, practicing words at 1am. A happy toddler at 2am is not a toddler in pain.
3. Look in the mouth in daylight. Not diagnostic on its own, but useful: a swollen, hard, shiny bump on a gum with a tooth edge under it is real evidence. Nothing visible plus no drooling makes teething a guess rather than a finding.
4. Follow the drool and the chewing. Teething toddlers gnaw — crib rails, fingers, spoons, your shoulder — and often produce a soggy shirt and a chin rash. That combination doesn’t come with regressions.
5. Watch what changed in the daytime. Regressions usually pair with a leap: new words arriving in a rush, climbing everything, sudden clinginess at drop-off, or a nap that’s abruptly a fight. Teething doesn’t come with new skills.
6. See whether the nap broke too. Teething tends to hit the going-to-sleep part and the small hours. A regression usually wrecks naps and bedtime and the 5am slot in one package.
7. Time the crying. Tooth pain often shows up worst in the first stretch of the night and again in the early hours. Wakes that land at consistent, predictable intervals all night are more regression-shaped.
8. Try comfort and see what works. Something cold to chew on, upright cuddling and gum pressure that visibly settles a kid points to teething. If nothing physical helps but a calm, boring, unchanged routine gradually does, you’re in regression territory.
9. Consider the calendar, gently. The famous toddler regressions cluster loosely around 18 months and two years, and the two-year molars turn up somewhere in that same wide window — which is precisely why these two get confused. Ages are a hint, never a verdict, and the honest answer is often “some of both.”

What to do tonight — teething version

Comfort and pressure, not gadgets. A chilled (never frozen solid) washcloth or a one-piece silicone teether like the Comotomo teether gives them something safe to bear down on; supervise it, and never tie anything around a child’s neck or attach a teether to a cord. Cold food helps at this age too — chilled yogurt, cold cucumber sticks cut safely, a cold drink before bed.

Then change nothing else. Keep the same routine in the same order, offer extra comfort inside it, and resist inventing new habits — a week of rocking to sleep outlasts the tooth by about a month. If you’ve already drifted into new habits, my bedtime battle tips walk back out of them. For a deeper read on how tooth pain actually interacts with night waking, Betteroo’s teething and sleep guide is the clearest explainer I’ve found.

Pain relief is a pediatrician question, not a blog question. I’m not going to tell you what to give or how much — ask your child’s doctor, and follow what they tell you.

What to skip entirely

• Benzocaine teething gels. The FDA has warned against over-the-counter benzocaine products for children under two because of a rare but serious blood disorder. Not worth it.
• Amber teething necklaces and bracelets. Anything worn around a baby’s or toddler’s neck is a strangulation risk, and the beads are a choking risk if the strand breaks. No sleeping in them, ever — and honestly, no wearing them.
• Homeopathic teething tablets and gels. These have been the subject of FDA safety warnings over the years, and there’s no good reason to gamble on inconsistent contents for a self-limiting problem.
• Anything frozen rock-solid. Chilled is the goal; ice-hard objects can bruise already-sore gums.

What to do tonight — regression version

The opposite instinct: don’t add comfort props, add consistency. Keep bedtime and the routine identical, respond briefly and boringly, and give it two weeks before you conclude anything. Regressions end because the skill consolidates, not because you found a trick — and the habits you invent during one are what tend to stick around afterwards.

Two things genuinely help. First, check the schedule: a toddler mid-leap is often either overtired or under-tired, and a bedtime built from how today’s naps actually went beats a fixed time on a chart. Second, hold the line in the same words every night — my won’t-stay-in-bed tricks are the escalation ladder for the kid who turns 2am into a social event. If yours is at the earlier end, the 18-month regression has its own pattern worth recognizing, and my 12-month regression tips cover the one nobody warns you about.

Not sure it's either one? Betteroo turns answers about your toddler into today's nap windows and tonight's bedtime — so when the night falls apart, you can rule the schedule out first. Take the 2-minute sleep quiz →

The symptoms that mean it’s neither

Teething does not cause a high fever. It doesn’t cause vomiting, diarrhea, a serious rash, a cough, or a genuinely unwell child. Those are illness, and blaming them on a tooth is how a real infection gets a day or two later than it should. Call your pediatrician for a fever in a toddler that’s high or persistent, for any fever at all in a very young baby, for refusal to drink, for unusual sleepiness or floppiness, for breathing that worries you, or for pain that seems severe or that nothing touches.

Same goes for a “regression” that keeps going. Weeks of broken nights with loud snoring, mouth breathing, pauses in breathing, or a child who is exhausted all day is worth a medical conversation rather than another sleep strategy. And if the whole thing started with a cold, it may simply be an illness week — my sick toddler sleep tips cover surviving that without wrecking your routine.

FAQ: teething vs sleep regression

How long does teething affect sleep?

Usually a short, lumpy stretch — a few rough nights around the time a tooth is actively moving, then back to normal. Weeks of continuous bad nights with no tooth appearing points to something other than teething, whether that’s a regression, illness, or a schedule that’s stopped fitting.

Can teething and a sleep regression happen at the same time?

Yes, and they often do — the toddler regressions and the molars land in overlapping windows. When both are in play, treat the pain with comfort measures and treat the sleep with consistency, and don’t expect a single clean explanation.

Does teething cause a fever?

Teething does not cause a high fever. Some parents notice a very slight rise in temperature, but anything you’d genuinely call a fever needs a different explanation and, if it’s high or persistent, a call to your pediatrician. Don’t let a tooth take the blame for an illness.

Should I change my toddler’s sleep routine during teething?

No — add comfort inside the existing routine rather than replacing it. Extra cuddles, something cold to chew before bed, the same order of steps. New habits invented during a rough week tend to outlast the tooth by a long way, and then you have two problems.