The truth about teething. What it actually causes and what it does not.

Somewhere between four and ten months, your baby will start drooling like a broken tap, gnawing on your shoulder, and being intermittently miserable. You will google everything. And the internet will tell you teething causes fever, diarrhea, ear pulling, sleep catastrophe, and possibly the weather. Most of that is not quite right.

Here is the clearer picture, because you deserve actual information, not a grab bag of myths.

Here is what is actually going on

Baby teething symptoms start before any tooth appears. The roots form first, and as each tooth slowly pushes up through the gum, it creates pressure and mild inflammation in the surrounding tissue. That process is genuinely uncomfortable. It is not excruciating, most of the time, but it is persistent and unpredictable.

The thing is, teething happens across roughly two and a half years, from around six months to age three, as all 20 baby teeth come through in waves. So any symptom your baby has during that entire window can get blamed on teething, whether or not teething is actually causing it.

That is where the myths pile up. Babies get sick, have developmental leaps, go through sleep regressions, and hit fussy periods all during the same season of life. Teething is not causing most of it.

When teething usually shows up

Most babies cut their first tooth somewhere between 4 and 10 months, with six to eight months being the most common window. Some babies arrive at their first birthday already showing a full set of front teeth. Others are still smooth-gummed at 12 months and perfectly fine.

The teething timeline runs roughly like this: front bottom teeth first, then front top teeth, then the sides, then the first molars around 12 to 18 months, a quiet gap, and finally the second molars around age two to three. The molars tend to be the hardest stretch, not the front teeth.

If you have ever noticed that your baby seems to have more sleep disruptions right around a year, teething molars is often part of that picture.

How to tell teething is what is happening

Real baby teething signs look like this:

• More drooling than usual, sometimes a lot more
• Chewing on hands, toys, or your fingers with unusual urgency
• Swollen, slightly reddened gums in a specific spot
• Mild fussiness that comes and goes during the day
• A slight increase in clinginess or unsettled sleep
• A drool rash around the chin, cheeks, or chest (from the saliva, not the tooth itself)

If your baby is doing all of those things but is otherwise eating, playing, and generally like themselves, teething is a very reasonable explanation.

If she also has a fever above 38 degrees Celsius (100.4 Fahrenheit), diarrhea, vomiting, a rash on her body, or seems genuinely unwell, something else is going on alongside the teething. Those symptoms are worth calling your pediatrician about. They are not caused by the tooth coming through.

For a deeper look at whether teething is behind your baby's general fussiness or something else entirely, that article is worth a read.

Things that actually help

Something cold to press against the gums

Cold reduces inflammation and numbs the area briefly. A chilled (not frozen) teething ring, a cold damp washcloth, or a cool silicone toy works well. Frozen solid objects can be too hard and cause more pain. Let her chew at her own pace.

A gentle gum massage

A clean finger pressing gently and rubbing along the gum line can give real relief. It is counterintuitive because pressing a sore spot sounds uncomfortable, but the counterpressure helps. She will probably try to bite you. That is fine.

Extra closeness

When she is unsettled from gum soreness, being held and carried helps. It is not a habit she needs to unlearn. It is just comfort when she is uncomfortable.

Infant paracetamol or ibuprofen if she is genuinely distressed

If the gum soreness is keeping her from sleeping or feeding, the appropriate dose of infant pain relief is a reasonable call. Check the dosing guidelines on the packet or with your pharmacist. Save it for the genuinely hard nights, not as a default.

Consistent distraction

Play, outdoor time, and being engaged with you pulls attention away from the discomfort. Babies feel teething less intensely when they are busy.

There's a reason your baby is doing that

Willo maps your baby's first six years into 35 developmental phases. Instead of wondering what's wrong, you'll see what's actually happening and know it's right on time.

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Things that tend not to help

• Teething gels with benzocaine. Most pediatric guidelines have moved away from these. The numbing effect is brief and inconsistent, and benzocaine carries a small but real risk in babies.
• Amber teething necklaces. There is no evidence they reduce teething pain, and they are a genuine strangulation and choking hazard. Most pediatricians will tell you to skip them.
• Assuming any fever is teething. Teething can cause a slight rise in temperature, but a true fever (above 38C / 100.4F) is your baby's immune system responding to something else. It deserves its own investigation.
• Blaming teething for diarrhea. The connection is not well supported by research. Increased drooling can alter the gut environment slightly, but significant diarrhea during teething is almost always a separate illness. Take it seriously.

For a proper breakdown of whether that raised temperature is actually related to teeth, the article on whether teething causes fever covers exactly that question.

When to stop reading articles and call your pediatrician

Teething is uncomfortable but it is not dangerous, and most babies get through it with cold toys and patience. Call your pediatrician if:

• Your baby has a fever above 38C (100.4F)
• There is vomiting, significant diarrhea, or a body rash
• She seems genuinely unwell, not just fussy
• She is refusing to feed for an extended period
• You see a bluish, fluid-filled bubble over an erupting tooth (this is a harmless eruption cyst, but worth getting eyes on it)
• You simply cannot tell whether she is teething or sick and your gut is telling you something is off

Your gut is a real diagnostic tool. Use it.

How Willo App makes this easier

Inside Willo, you can see exactly which developmental phase your baby is in, including the teething waves that are typical for that window. When you are not sure whether what you are seeing is teething or something else, the Ask Willo feature is there at any hour to help you think it through. Not as a replacement for your pediatrician, but as the calm voice in the room when you cannot figure out who to call at 11pm.

Teething is a long season. It does not last forever, even when it feels like it might.