When to start brushing baby teeth is simple: begin as soon as your baby’s first tooth appears. You don’t need to wait for more teeth or a particular birthday; the first tooth is the cue to start brushing. [1][2]
Baby teeth need care from the start, even though they will eventually fall out. Starting when that first tooth comes in helps you make oral care part of your baby’s everyday routine, rather than something to begin later. [3][4]
Before a tooth appears, you can gently keep your baby’s mouth clean, but that is mouth care—not toothbrushing. Once you see the first tooth, shift to brushing it; for example, a visible new tooth along the lower gum is enough reason to begin. [3][4]
The timing can feel easy to miss when you are watching for several changes at once. You do not need to count teeth or wait until your baby seems ready to cooperate: start when you can see that first tooth. This keeps the decision tied to a clear sign instead of an age estimate.
As your baby grows, the routine can grow with them. For now, the main milestone is straightforward: before the first tooth, focus on keeping the mouth clean; from the first tooth onward, brush the teeth. [1][3]
What can you do before the first tooth appears?
Before the first tooth appears, gently cleaning your baby’s mouth can be an optional way to begin a care routine, but it is not toothbrushing. You can treat this as a small, low-pressure moment of care rather than a task you must complete on a set schedule.
Some caregivers choose to wipe the gums or mouth gently as part of getting their baby comfortable with mouth care. Others wait until a tooth appears to introduce cleaning. Either way, keep the distinction clear: use a toothbrush once a tooth erupts.
You do not need to turn pre-tooth cleaning into a detailed routine based on a particular method or timing. If you choose to include it, a simple example might be adding a brief mouth-care moment to an everyday caregiving routine, such as after another familiar activity. Keep it gentle and follow your baby’s cues; if your baby becomes unsettled, you can pause and try again another time.
Before teeth arrive, think of this as an optional introduction to care, not a substitute for brushing. Once you see the first tooth, switch to a toothbrush rather than continuing to rely on mouth cleaning alone. That clear transition makes it easier to know when the next stage begins without needing to follow a fixed birthday or pre-tooth schedule.
How does brushing change when the first tooth comes in?
Once the first tooth is in, use a soft, age-appropriate toothbrush and a tiny smear of fluoride toothpaste twice a day. [2] You can keep the routine simple: you do the brushing, using a gentle touch and a brush sized for your baby’s mouth. [2][4]
Keep the routine brief and steady
Choose a soft brush made for a baby or young child; the toothbrush should be comfortable to hold and small enough to fit easily in your baby’s mouth. [2][4] Put only a tiny smear of fluoride toothpaste on the bristles, rather than covering them with a long ribbon of paste. [2]
Brush two times a day, such as after breakfast and before bed, so it becomes part of familiar daily routines. [2] If your baby squirms or wants to grab the brush, keep the moment calm and short, and finish the brushing yourself. [1]
Your baby may be curious about the toothbrush, and that is fine, but the caregiver should do the brushing at this stage. [1] You can let your baby see the brush and talk softly while you clean the tooth, without turning the routine into a long explanation. [1]
For example, you might say, “Let’s brush your tooth,” then gently brush and put the toothbrush away. If the timing feels awkward at first, try pairing brushing with a routine you already do every morning and evening. These small steps can make it easier to repeat the habit without adding a complicated new task.
What changes as more baby teeth appear?
As more baby teeth appear, keep brushing them as part of the same twice-daily routine. [2] You do not need to create a separate routine for each new tooth; keep the existing habit going as your baby’s smile changes.
For example, when a new tooth comes in beside the first, include both teeth in the brushing routine. Continue doing this as additional teeth appear, rather than focusing only on the newest tooth. [2]
When two teeth touch, you may need to clean between them as well. [5] Pay attention to places where neighboring teeth meet, since those spots may need care in addition to brushing the visible surfaces.
Keeping the routine steady can make these changes easier to manage. You might find that a brushing session takes a little more attention as more teeth appear, but the basic pattern stays the same: brush twice a day and include the teeth that have come in. [2] If teeth begin touching, account for the spaces between them too. [5]
Your baby’s mouth will change gradually, so take the routine one tooth at a time. The goal is to keep up the regular brushing as the smile fills in, while noticing when teeth meet and may need cleaning between them.
Who should brush as your child gets older?
Let your child take part in brushing as they grow, but keep helping and checking rather than handing over the whole routine. You can make brushing a shared task: invite your child to hold the toothbrush or try a few strokes, then take a turn yourself to make sure brushing is finished. [1]
Make brushing a team effort
A child’s interest in brushing is a good reason to include them, not a sign that they are ready to manage it alone. Stay close, offer simple encouragement, and check that the brushing is complete; if your child gets distracted or stops early, gently finish the job for them. [1]
Keep your role flexible. For example, your child might start brushing while you stand beside them, or you might take the lead while they practice holding the brush. The goal is to let them participate while you remain responsible for helping and checking.
Keep helping as your child grows
Some children may need help with brushing until at least age seven or eight. [6] Treat that as a general point of reference, not a deadline: continue to supervise and assist based on how well your child manages the routine, rather than expecting independent brushing at a particular birthday.
As your child becomes more involved, you can gradually let them do more while staying nearby. If they miss spots, rush, or lose focus, step in calmly and help finish. Your continued involvement makes it easier to keep brushing a shared routine instead of leaving your child to figure it out alone.
Common questions about starting baby toothbrushing
Can I wait until several teeth come in?
No. Start brushing when your baby’s first tooth appears; you do not need to wait for several teeth to erupt. [1] [2] For example, if you can see just one tooth, that is the point to begin brushing it.
Does the exact age matter?
The cue is tooth eruption, not a particular birthday. [1] [3] Babies’ teeth may appear at different times, so focus on whether you can see a tooth rather than comparing your baby’s age with another child’s.
What if I’m not sure whether a tooth has come through?
If you are unsure whether what you see is a tooth or have questions about your baby’s mouth, ask a dental professional for guidance. You can describe what you’ve noticed and ask what to do next. For individual advice, check with a dental professional who can consider your child’s needs.
When should I ask a dental professional about my child’s needs?
Reach out if you have a concern about your child’s teeth or want advice tailored to your child. A dental professional can help answer questions about when to begin and what care is appropriate for your baby.
Start with the first tooth and keep going
Keep brushing part of your child’s care as they grow: the routine begins when the first tooth appears. [1] A steady, familiar habit can make toothbrushing feel like an ordinary part of the day rather than a task you have to rethink at every stage.
You can keep the routine simple. Choose a regular moment that fits your family, such as after breakfast and before bed, and make room for brushing even when the rest of the day feels busy. The key is to keep returning to the habit as your child grows, rather than waiting for a perfect routine.
As your child becomes interested, invite them to join you while you brush. Then brush for your child, too. [1] For example, they might hold their toothbrush while you help finish the job. A small role can help them feel included without leaving the brushing routine entirely up to them.
If a day goes off schedule, start again at the next usual brushing time. You do not need to make the routine elaborate; aim for something manageable that your family can repeat. The next step is simple: when that first tooth appears, begin brushing and keep the habit going as your child grows. [1]