When Do Babies Start Teething? Signs, Timeline, and How to Help

If your baby has been fussier than usual, drooling more, and chewing on everything in sight, you might be wondering: when do babies start teething? The short answer is that teething typically begins around 4–7 months of age — but the full range is much wider, and knowing what to expect can make this stage significantly less stressful for both you and your baby.

The Typical Teething Timeline

Babies are born with all 20 primary (baby) teeth already formed beneath their gums. These teeth emerge in a predictable — though not rigidly fixed — sequence over the first three years of life.

4–7 months: Lower central incisors (the two bottom front teeth) — usually the first to appear.

8–12 months: Upper central incisors (two top front teeth).

9–16 months: Upper and lower lateral incisors (the teeth on either side of the front teeth).

13–19 months: First molars — the largest teeth in the mouth; often the most uncomfortable eruption.

16–23 months: Canine teeth (the pointed teeth between incisors and molars).

23–31 months: Second molars — the final set of baby teeth.

By age 3, most children have a full set of 20 primary teeth.

When Is Teething "Early" or "Late"?

The normal range for first tooth emergence is 4–15 months. If your baby hasn't gotten a tooth by 18 months, talk to your pediatrician — this is sometimes associated with nutritional deficiencies or underlying developmental factors. However, some babies simply teeth later and catch up completely.

Babies born prematurely may teethe later relative to their chronological age but closer to their adjusted age (calculated from due date rather than birth date).

Signs Your Baby Is Teething

Not all babies show the same symptoms, and some babies show almost no signs at all — a first tooth simply appears one day. But common teething signs include:

Increased drooling — Possibly the most consistent sign. Saliva production increases significantly. The drool rash on chin and cheeks is a secondary symptom — keep the area dry to prevent irritation.

Chewing and gnawing — Babies find counter-pressure against their gums soothing. They'll chew on fingers, toys, bibs, and anything else within reach.

Irritability and fussiness — The pressure of an erupting tooth is genuinely uncomfortable. Some babies are mildly fussy; others are inconsolable for days before a tooth appears.

Swollen, tender gums — You may be able to see and feel a slightly swollen, reddish area where a tooth is coming in. Sometimes you can see a bluish "eruption cyst" — a fluid-filled blister above the tooth that typically resolves on its own.

Night waking — Teething pain often worsens at night. Many babies who were sleeping well begin waking again during teething periods.

Low-grade fever — Mild temperature increases (under 100.4°F/38°C) are sometimes associated with teething, though research on the teething-fever connection is mixed. Higher fevers are NOT caused by teething and indicate illness.

Ear pulling and cheek rubbing — Pain radiates from the jaw to the ears and cheeks; babies instinctively touch the areas that hurt.

Refusing to eat — The sucking action of nursing or bottle feeding can increase gum pressure and pain, causing some babies to refuse feeds. This is typically temporary.

What Does NOT Cause Teething (Despite Popular Belief)

Persistent folklore attributes many symptoms to teething that modern research doesn't support:

• High fevers — Teething does not cause temperatures above 100.4°F. If your baby has a high fever while teething, treat the fever as you would any other time and consult your doctor if it persists.
• Diarrhea — Not caused by teething, though increased drool swallowing may slightly loosen stools.
• Runny nose — Not a direct teething symptom.
• Severe vomiting — Always an indication to call your doctor, not a teething side effect.

How to Help a Teething Baby

Cold teething rings — Refrigerate (not freeze) a teething ring and give it to your baby to chew. The cold reduces inflammation and provides counter-pressure relief. Never freeze teething rings — frozen hard surfaces can damage gum tissue.

Cold, wet washcloth — Wet a clean washcloth, twist it into a stick shape, and refrigerate. Babies love gnawing on the texture and temperature.

Gum massage — Wash your hands and gently rub your baby's gums with a clean finger. The counter-pressure provides immediate but temporary relief.

Cool foods — For babies eating solids, chilled foods like yogurt, applesauce, or pureed fruit can soothe sore gums.

Extra cuddles — Sometimes the best teething remedy is distraction and comfort from a parent.

Pain medication — For babies over 2 months, acetaminophen (Tylenol) can relieve significant discomfort. For babies 6 months and older, ibuprofen (Motrin/Advil) is also safe and effective. Always follow dosing instructions based on your baby's weight. Consult your pediatrician before use.

What to AVOID When Teething

Benzocaine teething gels (Orajel) — The FDA warns against using benzocaine products in children under 2. Benzocaine can cause methemoglobinemia — a serious condition that reduces the blood's ability to carry oxygen.

Homeopathic teething tablets or gels — Products containing belladonna have been linked to serious adverse reactions and should be avoided entirely.

Amber teething necklaces — These are a serious choking and strangulation hazard. No scientific evidence supports their effectiveness, and multiple infant deaths have been associated with teething jewelry. Avoid completely.

Frozen teething rings — Too hard; can damage delicate gum tissue.

Aspirin — Never give aspirin to children or teenagers due to the risk of Reye's syndrome.

Teething and Sleep: What to Expect

Teething can significantly disrupt sleep, especially during the eruption of first molars — the largest teeth and often the most painful. You may notice your baby waking more frequently, struggling to settle, and needing more comfort at night.

This is normal and temporary. Return to your normal sleep strategies once the tooth has broken through. Teething pain is typically worst in the 24–48 hours before a tooth appears and eases significantly once it's through.

Caring for Baby Teeth

Once teeth appear, it's time to start dental care:

• From first tooth: Wipe teeth with a soft, damp cloth after feeds.
• From 12 months (or when multiple teeth are present): Use a soft infant toothbrush and a rice-grain-sized smear of fluoride toothpaste.
• From 3 years: Increase to a pea-sized amount of fluoride toothpaste.
• First dental appointment: Schedule by age 1 or within 6 months of the first tooth appearing.

Baby teeth matter enormously — they hold space for permanent teeth, enable proper chewing, and support speech development. Dental decay in baby teeth is common and painful. Start good habits early.

When to Call Your Doctor

Contact your pediatrician if:

• Baby has a fever over 100.4°F — this is illness, not teething.
• Swelling, bruising, or bleeding at the gum site (beyond the normal eruption blister).
• Baby is refusing all feeds for more than 12 hours.
• No teeth have appeared by 18 months.
• You're considering any teething product and want guidance on safety.

Final Thoughts

When do babies start teething? Most commonly around 4–7 months — but the normal range is wide, and every baby is different. What matters most is knowing the signs, having safe soothing strategies ready, and knowing when teething symptoms cross into something that needs medical attention.

With a cold teething ring, some extra cuddles, and a lot of patience, you'll get through this stage — and your baby's first toothy smile will make it completely worth it.

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