When Do Baby Teeth Come In? A Parent’s Complete Guide to Infant Teething

When do Babies Start Teething

Picture this: It’s 2 a.m., your baby won’t stop fussing, they’re gnawing on everything in sight, and their chin is soaked. You’re exhausted, and somewhere between the fifth bib change and a frantic Google search, you find yourself asking: when do babies start teething, and is this even normal?

You’re not alone. Every parent goes through it, and the good news is—your baby is likely right on schedule. Understanding the baby’s teething timeline can take a tremendous amount of guesswork and anxiety out of this milestone. In this guide, you’ll learn exactly when to expect each tooth to appear, how to recognize genuine teething symptoms, what to do (and not do) to soothe your little one, and when it’s time to call your pediatric dentist. By the end, you’ll feel like you actually know what’s coming next.

What Is Baby Teething?

Baby teething, clinically referred to as primary tooth eruption, is the process by which your infant’s first set of teeth pushes through the gum tissue and becomes visible in the mouth. These are often called milk teeth, deciduous teeth, or simply baby teeth — and every single one of them was already forming beneath your baby’s gums before they were even born.

Here’s something that surprises many parents: your baby is born with a full set of teeth below their gums. Teething is simply the process of those teeth breaking through the gum line, one by one, over the course of the first few years of life. Most babies begin teething between 4 and 7 months of age, with lower central incisors typically appearing first. All 20 primary teeth usually emerge by around age 3.

Why Understanding When Do Babies Start Teething Actually Matters

Most parents assume teething is just something that happens — and they’ll deal with it when it comes. But knowing the baby teeth eruption sequence ahead of time makes a meaningful difference in your child’s oral health outcomes.

When you understand the teething timeline, you’re better positioned to start oral hygiene habits at the right moment. You’ll recognize teething symptoms for what they are rather than panicking over a fever or fussiness. And critically, you’ll know when to book that first dental appointment — which pediatric dentists at practices like Pediatric Dentistry & Orthodontics in Helena, MT consistently emphasize is far sooner than most parents expect.

Infants should have their first dental visit after their tooth erupts and no later than their first birthday. Skipping that window doesn’t just mean missing early cavity detection — it means missing the chance to establish the trust-based relationship between your child and their dentist that sets the tone for a lifetime of confident dental visits.

“The habits formed in infancy echo through a lifetime of smiles. Every tooth that comes in is an opportunity — don’t let it pass unchecked.”

Parents who bring their babies in early consistently tell us they wish they’d known sooner how easy and positive that first visit could be. No drills, no fear — just a gentle look, a few tips, and a high-five for the whole family.

The Complete Baby Teething Timeline: What to Expect Tooth by Tooth

The First Arrivals: Lower Central Incisors (6–10 Months)

The two bottom front teeth are almost always the first to make their appearance. You can see from the baby teething chart that your baby’s first teeth begin to break through their gums at about 6 months of age. Usually, the first two teeth to erupt are the two bottom central incisors. Some babies, however, follow their own schedule. On average, infants start teething around 6 months old, but some babies might have teeth come in as early as 3 months, while others may not see a full set of 20 primary teeth until they are 3 years old.

This is also when you’ll notice the first signs baby is teething — excessive drooling, gum swelling, and a strong urge to chew. It’s uncomfortable, but it’s temporary.

The Upper Front Teeth: Central and Lateral Incisors (8–13 Months)

Shortly after the bottom incisors appear, the upper four front teeth come through — typically between 8 and 12 months for the central incisors, followed closely by the lateral incisors on both the upper and lower jaw. By about 12 months, most children will have four front teeth on the top and bottom.

This is a critical window. Begin brushing with a soft-bristled infant toothbrush and a rice-grain-sized smear of fluoride toothpaste as soon as that first tooth appears. The team at Pediatric Dentistry & Orthodontics works with parents daily to build these foundational hygiene habits — because the gum tissue and enamel around those tiny new teeth need protection from day one.

Want to give your baby’s new smile the best start? We make first visits comfortable and fun.

Book Your Baby’s First Dental Visit Today →

The Eye Teeth: Canines (16–23 Months)

The canines — sometimes called cuspids or “eye teeth” — are the pointed teeth that flank the incisors. These typically arrive between 16 and 23 months and are often among the more uncomfortable teeth to cut, given their pointed shape. Gum tenderness is particularly common during this phase.

The Back Teeth: First and Second Molars (13–33 Months)

Your baby’s first molars usually appear between 13 and 19 months, followed by the second molars closer to their second birthday. Molars have a larger surface area breaking through the gum, which is why many parents notice a return of teething symptoms — fussiness, disrupted sleep, and increased drooling — during this phase, even if the earlier teeth came in quietly.

A general rule of thumb is that for every six months of life, approximately four teeth will erupt. By the time your child is about three years old, they should have a complete set of 20 primary teeth — ten on top, ten on the bottom.

Signs Baby Is Teething: What’s Normal and What’s Not

Recognizing teething symptoms early helps you respond quickly and confidently. Common signs include:

Increased drooling is one of the earliest and most reliable signals. Excessive drying drool may cause a rash around the mouth, cheeks, chin, and neck area due to extra bacteria on the skin. Keep extra bibs on hand and apply a gentle barrier cream to protect that delicate skin.

Gum swelling and tenderness is caused directly by the pressure of infant teething as teeth push upward through the tissue. You may be able to feel or even see the outline of the tooth beneath the gum.

Irritability and disrupted sleep are classic teething symptoms. The discomfort of the teeth erupting through the gums — often the first teeth and molars are the most uncomfortable — can cause fussiness, and cuddles and extra reassurance go a long way.

Chewing on everything is the baby’s instinctive response to gum pressure. It’s not destructive behavior — it’s self-soothing.

What teething does not cause: high fever (above 102°F), diarrhea, or respiratory symptoms. These need a call to your pediatrician, not just a teether. When in doubt, it’s always worth checking in. The signs that your child may need a pediatric dentist go beyond teething — read more about what to watch for on our blog: Signs Your Child Needs a Pediatric Dentist.

Common Teething Mistakes Parents Make

Using numbing gels with benzocaine.
The FDA has issued warnings against benzocaine-based products for infants. Many parents don’t realize these are on the restricted list and use them, assuming they’re safe because they’re on store shelves.

Dismissing the delayed eruption too quickly.
Every child is different, and a tooth or two running a month behind schedule is usually nothing to worry about. But if your baby has no teeth by 12 months, it’s worth a conversation with your pediatric dentist. Delayed eruption can occasionally signal nutritional deficiencies or developmental concerns.

Skipping the first dental visit.
A surprisingly large number of parents wait until age 2 or 3 for the first checkup. Your child should see a dentist 6 months after the eruption of their first tooth, or by age 12 months, whichever is first. Early visits establish baseline dental health and catch early decay before it becomes a problem.

Using liquid-filled or plastic teething rings.
Make sure the teether consists of solid rubber. For your baby’s safety, avoid plastic objects and liquid-filled teething rings that could easily break.

Overlooking nutrition’s role.
A well-balanced diet rich in vitamins and minerals supports healthy tooth development. Deficiencies in calcium and Vitamin D in particular, can affect both the timing of eruption and the structural quality of enamel.

What Does Teething Actually Cost — In Time, Sleep, and Dental Care?

Teething itself costs nothing — it’s a natural biological process. But the management of teething and the follow-through dental care it requires does involve some planning.

Teething relief products range from $5–$25 for solid rubber teethers, chilled washcloths, and over-the-counter acetaminophen or ibuprofen (for babies old enough — always check with your pediatrician first).

First dental visits are typically covered by most dental insurance plans when scheduled within the first year. The American Academy of Pediatric Dentistry recommends this visit, and most insurers treat it as preventive care.

Fluoride treatments and dental sealants, which become relevant as your child’s primary molars are established, are also typically covered as preventive services. At Pediatric Dentistry & Orthodontics in Helena, MT, these preventive treatments are a cornerstone of how we protect baby teeth from cavities — because those primary teeth hold space for permanent ones, and losing them too early has real consequences for jaw development.

What is the real cost of ignoring early dental care? Restorative treatment for early childhood cavities costs significantly more — financially and emotionally — than prevention ever would.

Families across Helena, East Helena, Montana City, and Clancy trust our team to navigate every phase from that first tooth to the final baby tooth handoff to the Tooth Fairy.

Questions Parents Are Actually Asking About Baby Teeth

Why is my baby drooling so much — is that really teething?
Yes, in most cases. When teeth begin pushing against gum tissue, it stimulates the salivary glands, causing excess drool. It typically starts a few weeks before the tooth actually breaks through and is often the very first sign that infant teething is underway.

Can teething cause a fever?
A very mild temperature elevation sometimes accompanies teething, but a true fever above 102°F is not a teething symptom — it signals illness. Always consult your pediatrician if your baby runs a high fever, regardless of whether teething is happening at the same time.

What’s the best teething remedy that’s actually safe?
A chilled (not frozen) solid rubber teether is one of the most effective and safest options. Gently rubbing your clean finger along the gum line also provides real relief. For significant discomfort, pediatrician-approved pain relief like infant acetaminophen can be appropriate — always at the correct dosage for your baby’s weight.

What if my baby is 10 months old and still has no teeth?
Don’t panic. Some babies teethe earlier, some later, and the exact timing may vary depending on the child. If there are no signs of any teeth by 12 months, schedule an appointment with a pediatric dentist. An X-ray can confirm that tooth buds are present and developing normally.

Do I really need to brush just one or two teeth?
Yes — absolutely. As soon as the first tooth erupts, oral hygiene begins. A rice-grain-sized smear of fluoride toothpaste on a soft infant brush, twice daily, is the recommendation from the American Academy of Pediatric Dentistry. The bacteria that cause cavities don’t wait for a full set of teeth.

Conclusion: The Teething Timeline Is a Road Map — Follow It With Confidence

When do babies start teething? Somewhere between 4 and 7 months for most families, though the range is wide, and every child’s baby teeth eruption sequence is uniquely their own. What matters far more than the exact month is staying prepared, staying consistent with oral hygiene, and getting your child in front of a pediatric dentist early.

Primary teeth aren’t temporary inconveniences — they’re the infrastructure for your child’s permanent smile. They guide jaw development, hold space for adult teeth, and shape how your child speaks, chews, and feels about going to the dentist for the rest of their life.

“Baby teeth are only temporary, but the habits formed around them are permanent.”

Every parent who’s wondered “is this teething, or is something wrong?” deserves a pediatric dental team that actually answers the phone, actually knows your child, and actually makes the visit feel easy. That’s exactly what families in Helena and the surrounding communities have found at Pediatric Dentistry & Orthodontics.

Curious about what healthy eating means for your child’s developing teeth? Read our guide: Healthy Eating for Kids’ Teeth

Your baby’s first tooth deserves more than a photo — it deserves a checkup.

Schedule Your Child’s First Visit With Our Board-Certified Team

Call us at (406) 449-0189 — same-day appointments available.

Frequently Asked Questions About Baby Teething

Q: When do babies start teething on average? 
Quick answer: Most babies begin teething between 4 and 7 months, with the lower front teeth typically emerging first.
Most infants show their first tooth between 6 and 10 months of age, though some babies begin as early as 3 months and others not until close to 12 months. The timing varies by genetics, nutrition, and individual development. A pediatric dentist can confirm normal development if you’re concerned about timing.

Q: What are the first signs that a baby is teething? 
Quick answer: Increased drooling, gum swelling, irritability, and compulsive chewing are the most reliable early signs.
These symptoms typically appear several weeks before the tooth actually breaks through. You may also notice disrupted sleep, decreased appetite, and general fussiness. A mild temperature uptick is possible, but a true fever above 102°F is not a teething symptom and should be evaluated by a pediatrician.

Q: What is the baby’s teething order? 
Quick answer: Lower central incisors come first, followed by upper central incisors, then lateral incisors, canines, first molars, and second molars.
The full eruption sequence typically unfolds between 6 months and 33 months, with teeth emerging in pairs on opposite sides of the jaw. Lower teeth generally arrive before their upper counterparts. By age 3, most children have all 20 primary teeth.

Q: How long does teething last for each tooth? 
Quick answer: Individual teething episodes typically last 3–7 days per tooth, though the overall teething period spans roughly 2–3 years.
The most intense discomfort tends to occur in the few days just before and immediately after a tooth breaks through the gumline. The molar phases — particularly around 13–19 months and again around 23–33 months — are often the most uncomfortable because of the larger surface area involved.

Q: Is it normal for a 3-month-old to start teething? 
Quick answer: Early teething at 3 months is uncommon but not abnormal, and typically requires no intervention unless teeth appear loose.
Some babies begin cutting teeth much earlier than the 6-month average. This doesn’t cause long-term problems in most cases, but early teeth should be evaluated by a pediatric dentist to confirm stability and rule out any underlying concerns.

Q: When should I take my baby to the dentist for the first time? 
Quick answer: Schedule your baby’s first dental visit within 6 months of their first tooth appearing, and no later than their first birthday.
This first appointment is not scary — it’s a gentle exam, a chance to ask questions, and an opportunity to start your child’s relationship with dental care on a positive note. Early visits are associated with lower rates of childhood cavities and significantly less dental anxiety later in life.

Q: How can I soothe a teething baby safely? 
Quick answer: Chilled solid rubber teethers, gentle gum massage, and pediatrician-approved pain relief are the safest and most effective options.
Avoid benzocaine gels (FDA-restricted for infants), frozen teething rings, and amber teething necklaces (a documented choking and strangulation hazard). Cuddles, chilled washcloths, and extra attention during difficult nights go a long way.

Q: Do baby teeth really matter if they fall out anyway? 
Quick answer: Yes — primary teeth hold space for permanent teeth, support jaw development, and directly affect speech and chewing function.
Losing a baby tooth too early due to decay or injury can cause neighboring teeth to drift, reducing the space available for the permanent tooth coming in below. This often leads to crowding and orthodontic issues that could have been easily prevented.

Q: Can teething cause diarrhea? 
Quick answer: No — teething does not cause diarrhea. This is a common myth that can lead parents to overlook a gastrointestinal illness that needs treatment.
While excess drooling during teething can occasionally cause loose stools if large amounts are swallowed, true diarrhea is not a teething symptom. Consult your pediatrician if your baby has significant digestive symptoms during a teething period.

Q: What foods help with teething pain? 
Quick answer: Cold, soft foods like chilled purées, yogurt, or applesauce can soothe inflamed gums while also providing nutrition.
For babies already on solids, chilled (not frozen) soft foods offer gentle counter-pressure relief. Avoid hard foods that could chip an erupting tooth, and skip anything with added sugar that could contribute to early childhood cavities. Our guide on healthy eating for kids’ teeth has more on building tooth-friendly food habits from infancy.