TL;DR: Most babies get their first tooth between 4 and 7 months, but a window from 3 months to over a year is completely normal. Teething can bring drooling, chewing, and mild fussiness—but never a high fever or diarrhea. Safe relief comes from cold (not frozen) items, gum massage, and, for a first tooth, a gentle electric toothbrush. Skip amber beads, numbing gels, and frozen rings. And call your pediatrician for fever over 100.4°F or inconsolable crying.
You’re sitting on your couch at 3 a.m., rubbing your baby’s back as they gnaw on your knuckle with surprising force. You Google, “When do babies start teething?” Welcome to the club. Understanding the timeline of primary tooth eruption—and knowing what’s normal—can help you navigate this phase with more confidence and less frantic searching.
Understanding the Timeline of Baby Teeth
The average first tooth appears around 6 months, but a wide range is healthy. According to a global systematic review of over 42,000 children, the first tooth (lower central incisor) erupts anywhere from 6 months in North America to 13.5 months in parts of Asia. Data show global variation in eruption chronology. So if your friend’s baby sprouted two teeth at 4 months and yours is still gumming it up at 11 months, neither is behind.
Genetics play a major role. If you or your partner teethed early or late, your baby may follow suit. Prematurity can also shift the clock: using corrected age, preterm infants often erupt teeth earlier than expected. Parents observed that preterm infants erupted teeth sooner when adjusted for gestational age. Still, most babies will have a full set of 20 primary teeth by their third birthday.
The Eruption Order
- Lower central incisors (bottom front teeth) — usually first, around 6–10 months.
- Upper central incisors — next, 8–12 months.
- Upper lateral incisors — 9–13 months.
- Lower lateral incisors — 10–16 months.
- First molars — 13–19 months.
- Canines — 16–23 months.
- Second molars — 23–33 months.
This sequence is predictable, but timing varies. There’s no rush; a late-bloomer isn’t developmentally delayed just because they haven’t cut a tooth by their first birthday.
Is Your Baby Teething Right Now?
Teething often gets blamed for everything from a runny diaper to a runny nose. But what are the actual teething symptoms? In a clinical trial tracking 254 children, the three most common signs were drooling (92%), sleep disturbances (82.3%), and irritability (75.6%). Researchers found these symptoms peaked on the day of eruption. You might also notice:
- Gum rubbing and increased biting or chewing on fingers, toys, or everything.
- A mild, low-grade temperature (below 100.4°F) — right around the day a tooth pops through, not days before.
- Flushed cheeks or a slight facial rash from drool.
- Decreased appetite, especially for solid foods.
Notice what’s missing: high fever, diarrhea, full-body rash, and severe cough. These are not caused by teething. When a parent asks me if teething can cause a 103°F fever, the answer is no. Teething does not cause systemic illness; if your baby has a true fever (>100.4°F) or significant diarrhea, something else is going on—likely a viral infection. Misattributing these symptoms can delay diagnosis of ear infections, urinary tract infections, or other issues. So trust your gut, but also your thermometer.
How to Soothe a Teething Baby
Safe relief starts with simple, physical methods. The goal is counterpressure and cold—both reduce gum inflammation and distract from discomfort.
- Cold, not frozen. A chilled (never frozen) silicone teething ring or a clean, wet washcloth placed in the refrigerator for 10–15 minutes can be a game-changer. Frozen items can cause frostbite-like injuries to tiny gums.
- Gum massage. Wash your hands and use a clean finger to gently rub the swollen area. You’ll feel the sharp ridge of a tooth just beneath the surface.
- Cuddle therapy. Sometimes all your baby needs is to be held. In the same clinical trial, cuddle therapy and gum rubbing were among the most effective methods, alongside teething rings. Non-pharmacological remedies, especially teething rings and gum massage, provided the best relief.
- Start gentle oral care early. When that first tooth breaks through, you’re no longer just soothing gums—you’re cleaning a tooth. An electric toothbrush designed for infants can gently sweep away plaque from that tiny new surface, and many babies find the soft vibration comforting. Used with plain water, it’s a safe way to build a brushing habit from day one.
If non-drug methods aren’t enough and your baby is clearly in pain especially at night, weight-based acetaminophen (Tylenol) or ibuprofen (Motrin) for infants over 6 months can be used occasionally. Always follow the dosing instructions based on weight, not age, and consult your pediatrician if you’re unsure. Never give aspirin, and don’t use pain relievers around the clock; they are a backup, not a first line.
What Not to Do
Well-meaning parents have been handed some dangerous advice over the years. Let’s go through what to avoid—and why.
- Benzocaine-based numbing gels: The FDA strongly warns against benzocaine for teething because it can cause a rare but life-threatening condition called methemoglobinemia, which reduces oxygen in the blood. Even topical lidocaine gel is not recommended due to risks of seizures and respiratory arrest. Safety reviews show lidocaine teething gels have limited efficacy and serious toxicity risks.
- Amber teething necklaces: These are a strangulation and choking hazard, and there is zero scientific evidence that succinic acid released from heated beads relieves pain. The American Academy of Pediatrics and the FDA advise against them.
- Frozen teething rings: As mentioned, these can damage delicate oral tissues. Stick to refrigerator-chilled.
- Homeopathic teething tablets: Some have been found to contain inconsistent levels of belladonna, a toxic substance, and have been recalled.
- Rubbing alcohol or whiskey on gums: Never do this. It’s a myth from another generation and it’s extremely dangerous.
Your instincts to comfort your baby are spot on; just make sure the tools you use are as safe as your love.
When to Check with the Pediatrician
Most of teething is a wait-and-grow game. But certain signs mean it’s time to call the doctor.
- Fever over 100.4°F (38°C). True fever is not teething.
- Watery diarrhea. While some drool may loosen stools, ongoing watery diarrhea can lead to dehydration and often points to a stomach bug.
- Full-body rash, not just a mild perioral drool rash.
- Inconsolable crying that doesn’t respond to comfort measures or pain relief.
- No teeth by 15–18 months. While a late first tooth is usually fine if your baby is growing and developing normally, a pediatric dentist can rule out systemic causes like hypothyroidism if no teeth have appeared by then. The first dental visit should happen by age one or within six months of the first tooth anyway. That’s the ideal time to have eruption timing evaluated and get personalized advice.
As more teeth join the party, you’ll become a pro at spotting the signs. By then, having a routine that includes a sonic electric toothbrush with soft bristles can make twice-daily brushing a soothing ritual rather than a struggle. The earlier oral care becomes a consistent, calm part of the morning and bedtime routine, the easier it is for your child to accept it for life.
Remember: you know your baby better than anyone. If something feels off, trust that feeling and call your pediatrician. Teething is a normal developmental milestone—not an illness—and your calm presence is the best medicine.
Now, go clean that tiny tooth with a smile.
