Baby Teething: Symptoms, Timeline & Soothing Tips

Evidence-based, parent-tested. References guidelines from the AAP, CDC, and WHO.

Informational only, not medical advice. Always consult your pediatrician about your baby's specific needs.

Your baby is drooling through three bibs a day, gnawing on everything within reach, and waking more at night. Teething is the usual suspect — and usually the right one. The first tooth typically pushes through between 4 and 7 months, though a wide range is completely normal. But teething also gets blamed for a lot it doesn’t cause, and knowing the difference protects your baby. This guide walks through the real symptoms, a tooth-by-tooth timeline, safe soothing methods, and the red flags that mean you should call your pediatrician instead of reaching for a teething ring.

📌 Key Takeaway: According to the American Academy of Pediatrics, teething can cause mild gum soreness and increased drooling, but it does not cause high fever or diarrhea. Most babies get their first tooth between 4 and 15 months — a huge normal range. For the bigger picture of what to expect month by month, see our baby developmental milestones guide.

When Does Teething Start?

Most babies cut their first tooth between 4 and 7 months, but anywhere from 3 to 15 months is within the normal range. A small number of babies are even born with a tooth. If your one-year-old has no teeth yet, that alone is rarely a problem — genetics drive timing more than anything, so ask when you and your partner got your first teeth.

The bottom two front teeth (lower central incisors) almost always come first. Teeth generally arrive in pairs, and the whole set of 20 baby teeth is usually complete by around age 3.

What Are the Real Symptoms of Teething?

The evidence-backed symptoms are milder than folklore suggests. Research published in Pediatrics found teething is reliably associated with only a handful of signs:

Excessive drooling — often the earliest sign, sometimes weeks before a tooth appears
Gnawing and biting — pressure on the gums feels good, so everything goes in the mouth
Swollen, tender gums — you may see or feel a hard bump under the surface
Irritability or fussiness — especially in the day or two before a tooth breaks through
Mild temperature rise — a low-grade warmth under 38°C (100.4°F), not a true fever
Disrupted sleep — the same waking that shows up during a sleep regression can flare during teething

⚠️ Important: Teething does NOT cause high fever, vomiting, diarrhea, a runny nose, or a rash spreading beyond the mouth and chin. If your baby has any of these, something else is going on — teething just happens to overlap with the age when babies catch their first colds and infections.

Baby Teething Timeline: Tooth by Tooth

Teeth erupt in a fairly predictable order. Here’s the typical schedule, though your baby may run earlier or later:

Teeth	Typical Age	Notes
Lower central incisors	6–10 months	The famous "first tooth"
Upper central incisors	8–12 months	Top two front teeth
Lateral incisors	9–16 months	Beside the front teeth
First molars	13–19 months	Bigger — often more discomfort
Canines	16–23 months	Pointed "eye teeth"
Second molars	23–33 months	The last to arrive

By age 3, most children have all 20 primary teeth. Why does the order matter? It helps you anticipate the rougher stretches — molars, with their broader surface, tend to cause the most fuss.

How to Soothe a Teething Baby Safely

Simple, low-tech methods work best — and the safest options are also the cheapest.

What Works

✅ Clean finger or damp gauze: Gently rub the sore gum. Firm counter-pressure is genuinely soothing.
✅ Chilled (not frozen) teething ring: Cool it in the fridge, never the freezer — frozen surfaces can bruise delicate gums.
✅ Cold washcloth: Dampen it, chill it, and let baby chew. Cheap and effective.
✅ Solid silicone teethers: One-piece designs with no liquid inside and no small parts.
✅ Cold food (for babies already on solids): Chilled cucumber or a mesh feeder with cold fruit — always supervised. If you haven’t started solids yet, see our guide to first foods for babies.

What to Skip

⚠️ Safety alert: The FDA warns against teething necklaces and bracelets (amber, wood, or bead) — they are strangulation and choking hazards and have been linked to infant deaths. The FDA also warns against benzocaine gels (like Orajel) for babies under 2, which can cause a rare but serious blood condition called methemoglobinemia. Homeopathic teething tablets have been recalled for inconsistent belladonna levels. Skip all of these.

For pain that clearly disrupts feeding or sleep, infant acetaminophen or ibuprofen (ibuprofen only for babies over 6 months) can help — but ask your pediatrician for the correct weight-based dose first, and don’t use it as a daily routine.

Caring for Those New Teeth

Dental care starts before the first tooth even appears. Wipe your baby’s gums with a soft, damp cloth after feedings. Once a tooth erupts:

Brush twice a day with a soft infant toothbrush
Use a rice-grain-sized smear of fluoride toothpaste (pea-sized after age 3)
Never put baby to bed with a bottle of milk or juice — pooled sugar causes “baby bottle tooth decay”
Schedule the first dental visit by the first birthday, per the AAP and American Dental Association

Teething and Sleep

Here’s the honest truth: teething can disrupt sleep, but it’s often over-blamed. A tooth actively breaking through the gum may cause a night or two of extra waking. If waking stretches on for a week or more, teething probably isn’t the culprit — look at developmental leaps, hunger, or a genuine sleep regression instead. Resist starting new sleep-crutch habits during a rough teething night, or you may be untraining them for weeks afterward.

Common Questions About Teething

Can teething cause a fever?

Teething can raise your baby’s temperature slightly, but not into true fever territory. A rectal temperature of 38°C (100.4°F) or higher is a real fever caused by something else — most often a viral infection — and warrants a call to your pediatrician, especially in babies under 3 months.

How long does teething pain last?

For any individual tooth, active discomfort usually lasts only a few days — roughly the day before and the day it breaks through the gum. The overall teething stage spans about two years, but your baby is not in pain that entire time.

Does teething cause diarrhea?

No. Teething does not cause diarrhea. Loose, frequent, or watery stools point to a stomach virus or dietary change, not teeth. Persistent diarrhea, especially with signs of dehydration, needs medical attention.

Why is my baby biting while breastfeeding?

Sore gums make babies want to clamp down, and some bite at the end of a feed out of teething discomfort or boredom. Calmly break the latch, say a firm “no,” and offer a cold teether afterward. It usually passes within a week or two.

Should I worry if my 1-year-old has no teeth?

Usually not. Some perfectly healthy babies get their first tooth after 12 months. If there are still no teeth by around 18 months, mention it at a check-up so your pediatrician can take a look — but late teething is very often just genetics.

The Bottom Line

Teething is a normal, if messy, milestone. Keep these principles in mind:

Real symptoms are mild — drooling, gnawing, tender gums, fussiness, and slightly disrupted sleep
High fever, diarrhea, and vomiting are NOT teething — they signal illness, so call your pediatrician
Simplest soothing is safest — chilled rings, clean fingers, and cold washcloths beat gadgets
Skip teething necklaces and benzocaine gels — the FDA warns both are dangerous
Start dental care early — wipe gums, brush new teeth, and book that first-birthday dental visit

Trust your instincts. You know your baby’s normal fussy from their “something’s wrong” cry — and when in doubt, a quick call to your pediatrician always beats guessing.

💡 Further reading: For more on what’s coming next, see our month-by-month milestones guide and, when night wakings pile up, the baby sleep regression guide. More parenting resources at 媽媽生活復原力 Lab and family learning tools at 親子多元學習.

References

American Academy of Pediatrics (2024). “Teething: 4 to 7 Months.” HealthyChildren.org.
U.S. Food & Drug Administration (2023). “Safely Soothing Teething Pain and Sensory Needs in Babies and Older Children.”
Macknin, M. L., et al. (2000). “Symptoms Associated With Infant Teething: A Prospective Study.” Pediatrics.
American Dental Association (2024). “Baby Teeth & Teething.” MouthHealthy.org.

Medical Disclaimer: This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your pediatrician or healthcare provider with any questions about your baby's health.

Written by

Vega Lin

Founder & Editor — Mother of 2 (Taiwan)

Vega writes Baby Care Guide from the intersection of evidence-based research (AAP, CDC, WHO) and real parenting experience. Completing her Master's in Digital Innovation at Tunghai University. Read more →