Teething: The Real Signs, What Helps, and What Doesn't

First teeth usually arrive somewhere between 4 and 7 months, though the range that counts as normal is wide — some babies cut a tooth at 3 months, others not until closer to their first birthday. What's more useful than the exact timing is knowing which symptoms actually belong to teething and which ones get blamed on it unfairly.

What teething actually causes

The genuine signs are localized and mechanical: excess drooling, chewing on hands or objects, swollen or tender gums, and a baby who's fussier than usual — particularly around the tooth that's about to break through ¹. These symptoms cluster in the days right before a tooth emerges and settle down once it's through ⁶.

That clustering is the most useful diagnostic feature you have. Teething symptoms come in bursts of a few days tied to a specific tooth, then stop. A symptom that has run steadily for a week is very unlikely to be teething, whatever else is happening in your baby's mouth.

What order teeth arrive in

The four front teeth — two upper and two lower — usually come first, starting as early as six months, and most children have a full set of 20 primary teeth by age three ³.

Wide ranges are normal and the order matters more than the dates. Teeth generally arrive in symmetrical pairs, and a baby who is months "behind" the table but following the sequence is usually just on their own schedule.

The fever myth, specifically

Teething does not cause a true fever, and this isn't a minor semantic point — the American Academy of Pediatrics is specific about it because the myth has real consequences. Teething may raise a baby's temperature very slightly, but not to 100.4°F (38°C) or higher, which is the actual clinical threshold for fever ¹. Teething also does not cause diarrhea, diaper rash, or a runny nose, despite how often all three get attributed to it.

There's a simple reason the myth is so persistent: teething runs from roughly 6 to 24 months, which is exactly the window when maternal antibodies have waned and babies start catching everything. The teething and the illnesses genuinely do overlap constantly. That coincidence is not causation, and treating it as causation is how real infections get missed.

What actually helps

• Gentle counter-pressure — a clean finger or cool, wet washcloth rubbed on the gums for a minute or two ¹

• A firm (not liquid-filled) teething ring, chilled in the refrigerator, not the freezer — frozen rings can be too hard and bruise the gums ¹

• Something cold to chew, which is doing the same job as the ring: cold numbs, pressure counteracts the ache

• Pediatrician-approved doses of acetaminophen or ibuprofen (for babies over 6 months) on genuinely rough days, following weight-based dosing

• Extra comfort and closeness — teething discomfort is real, even without a fever

Counter-pressure is the underrated one. It costs nothing, needs no product, and it's the mechanism every teething toy is trying to reproduce.

What to skip, and why

This list is longer than the "what helps" list, which tells you something about the teething product market.

• Amber teething necklaces. No proven benefit, and a real strangulation and choking risk if a baby chews through the string or beads break loose. Pediatric and safety organizations recommend against them.

• Benzocaine gels and liquids. These carry a rare but serious risk of methemoglobinemia, a blood disorder, and the FDA does not recommend them for children under 2 ⁴.

• Prescription lidocaine for teething. The FDA specifically warns against using viscous lidocaine to treat teething pain, after reports of serious harm including overdose in infants ⁴.

• Homeopathic teething tablets and gels. The FDA found inconsistent and sometimes dangerously high amounts of belladonna — a toxic substance — in tested teething tablets, and received reports of serious adverse events in children consistent with belladonna toxicity. Its position is blunt: there is no known safe dose of belladonna in children ⁵.

• Frozen-solid anything. Refrigerator-cold, not freezer-hard.

Caring for the teeth once they arrive

Teething guides tend to stop at pain relief, but the tooth that just came through now needs looking after, and the current guidance starts earlier than most parents expect.

• Start brushing with the first tooth. Use a soft infant toothbrush twice a day ³.

• Use fluoride toothpaste from the first tooth — but only a smear, no larger than a grain of rice, until age 3. From 3 to 6, a pea-sized amount ²³.

• Book the first dental visit when the first tooth erupts, or by 12 months, whichever comes first ²³.

• Wipe gums before there are teeth. A clean damp cloth after feeds gets the habit started and keeps the mouth comfortable.

The fluoride advice changed some years ago — the older guidance was to wait until age two — so this is a genuine case where a grandparent's confident advice may simply be out of date rather than wrong at the time.

Drool rash, and other things teething really does cause

Heavy drooling is real, and the rash that comes with it is a genuine teething side effect — not on the diaper, but on the chin, neck and chest where saliva sits against skin. It's contact irritation, and it responds to the same approach as any irritant rash: pat dry often rather than wiping hard, and use a plain barrier ointment before naps and at night.

Teething can also disrupt sleep for a few nights around an emerging tooth. What it does not do is cause weeks of regression — sleep changes lasting longer than the tooth takes to arrive usually have another explanation.

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