Every parent knows that the early months are full of milestones, and teething is one that often catches families off guard, especially when it seems to start earlier than expected. If you’re searching “when do babies start teething” at 2am with a fussy, drooling infant in your arms, you’re not alone. While most babies start teething around six months, some show genuine signs of teething in infants as early as 2 or 3 months old. At Babymore, we know how unsettling it can feel to see your little one uncomfortable and unsure why, so we’ve put together this complete guide covering exactly when teething starts, what the signs look like at every age, and how to help your baby through it.
This is the single most searched question on the topic, and the honest answer is: it varies more than most people expect. According to NHS guidance, babies most commonly start teething around six months old, but it’s considered completely normal for teething to begin any time between 3 and 12 months. Some babies show early signs even earlier than that, around 2 to 3 months, though a visible first tooth this early is genuinely rare.
What age do babies start teething, in practical terms? Here’s the general teething age most babies follow, though every child is different:
By age 3, most children have a full set of 20 baby teeth. Before that first tooth breaks through, most baby first tooth symptoms drooling, gnawing, swollen gums, show up weeks in advance, which is exactly why so many parents notice symptoms far earlier than the “average” starting age suggests.
Yes, though it’s on the earlier end of normal. Baby teething at 2 months usually shows up as early symptoms rather than an actual visible tooth, increased drooling, more hand-to-mouth chewing, and mild gum sensitivity. It’s worth noting that at this age, a lot of mouthing and drooling is also just normal developmental behaviour unrelated to teething, since babies are naturally exploring the world with their mouths and their saliva production is increasing regardless. If you’re seeing signs of teething in a 2-month-old, it’s not necessarily anything to worry about, but it’s also not guaranteed to mean a tooth is imminent.
Yes, this is one of the more commonly reported ages for early teething signs to start, even though it’s still earlier than average. A 3-month-old showing early teething symptoms, drooling, gum swelling, chewing on hands, disrupted sleep, is within the normal range the NHS describes, even if the first tooth itself doesn’t actually break through for several more months.
By 4 months, teething symptoms tend to become a bit more noticeable and consistent for babies who are on the earlier end of the teething timeline. Teething symptoms at 4 months often include more persistent drooling, visibly swollen or reddened gums, and a stronger urge to chew on everything within reach. Some 4-month-olds will have a tooth breaking through around this time, though for most, it’s still a few months away.
At 5 months, many babies are approaching the more typical teething window, and symptoms often intensify as a first tooth gets closer to the surface. Alongside the usual drooling and gnawing, some 5-month-olds show a small, hard bump under the gum line, a visible sign that a tooth is close to erupting.
True newborn teething, in the first few weeks of life, is genuinely rare, though not impossible; some babies are even born with a tooth already present (known as a natal tooth). For the vast majority of newborns, drooling and mouthing in the very first weeks is normal reflexive and developmental behaviour rather than a sign of an imminent tooth, so it’s worth not reading too much into these very early signs specifically. Infant teething signs at this stage are best watched over time rather than judged from a single day’s behaviour.
Regardless of the exact age, the signs of teething tend to look fairly consistent across babies. Infant teething signs can vary a lot from child to child, but here’s what to actually watch for.
One of the most immediate and clear baby teething symptoms is a noticeable jump in drooling. If your baby’s bib or onesie is perpetually damp, teething may be to blame, since babies also naturally produce more saliva as their mouth matures. For a full age-by-age breakdown of what’s normal, see our guide on why your baby might be drooling so much.
Tip: Keep a soft cloth nearby to gently wipe your baby’s chin. A teething bib helps keep their clothes dry and can prevent a drool rash.
Babies naturally explore with their mouths, but a noticeable increase in gnawing on hands, toys, or fingers is one of the clearest first signs of teething. Chewing helps massage sore gums and offers temporary relief. For a deeper look at why this happens at every age, see our guide on why babies put their hands in their mouth.
Tip: Offer a soft teething ring or a cool, damp washcloth for safe chewing.
Teething babies often have red, swollen, or inflamed gums, particularly where the first teeth are due to come in. You may even notice a small white or hard bump just below the gum line, a sign a tooth is preparing to erupt.
Tip: Gently massage your baby’s gums with a clean finger for comfort.
Gum discomfort can make a baby noticeably crankier than usual, particularly around feeding or nap times. If your baby seems unusually fussy without an obvious cause, no dirty nappy, no hunger, teething could be a factor.
Just like adults, babies struggle to settle when uncomfortable. Increased night waking or difficulty falling asleep is a commonly reported teething symptom, and it’s not unusual for a run of bad nights to look a lot like a sleep regression, even in babies who aren’t toddlers yet. In fact, whether teething genuinely affects baby sleep is more debated than most parents realise, recent research suggests other causes are often behind the wake-ups too. Gentle rocking, white noise, or extra cuddles can help.
Some babies pull at their ears or rub their cheeks while teething, since gum discomfort can radiate to nearby areas. That said, always watch for signs of an ear infection, such as fever or fluid, alongside this behaviour. We cover this specific overlap in more detail in our guide on ear pulling in babies.
Teething can cause a slight increase in body temperature, but medical guidance is clear that it shouldn’t cause a true fever. If your baby’s temperature climbs above 38°C (100.4°F), that isn’t from teething and needs medical attention.
Sore gums can affect feeding in either direction: some babies want to nurse or bottle-feed more often for comfort, while others resist feeding due to gum sensitivity. A sudden shift in feeding patterns is worth paying attention to.
There isn’t one single confirmed cause of early teething, and in most cases it’s simply down to normal individual variation, in the same way babies reach other developmental milestones at slightly different times. Genetics does appear to play a role, if a parent or sibling teethed early, a baby is somewhat more likely to as well. It’s also worth remembering that early signs of teething don’t always mean an early first tooth; some babies show symptoms for weeks or months before a tooth actually appears.
A few safe, simple methods to ease discomfort at any age:
For a more detailed, age-by-age breakdown of safe relief methods, including paracetamol and ibuprofen dosing, check out our full guide on how to soothe teething pain in babies.
If your baby is showing signs of chewing on furniture, including the cot itself, alongside their usual teething toys, our guide on what to do if your teething baby is biting the cot covers how to keep this safe. Many of Babymore’s cot beds, including our Luno, Veni, Caro, and Eva ranges, include teething rails as standard, a protective cover along the top edge of the cot sides designed specifically to protect both your baby’s gums and the cot itself from chew marks.
Teething is uncomfortable, but it shouldn’t make your baby seriously unwell. Contact your doctor if your baby:
Whether your baby is showing signs at 2 months or waiting until well past six, the range of what’s considered normal teething is genuinely wide. By recognising the early signs, from drooling and chewing to fussiness and disrupted sleep, you can help keep your little one more comfortable, whatever age their first tooth decides to make its appearance.
For more on supporting your baby’s comfort and safety through this stage, our guide on teething and your baby’s cot covers how to adjust your cot setup as your baby grows and starts teething, and our full range of cots and cot beds includes several options with built-in teething rails for extra peace of mind.
