Potty Trained Naked…But Not in Underwear?
Does your toddler use the potty perfectly while naked but start having accidents as soon as underwear or undies go on? This is a common potty training roadblock. Here’s why it happens and what can help your child learn to stay dry with clothing on.
One of the most common reasons families reach out to me for potty training support, both through The Potty Coach and in my work as a psychologist in a hospital setting, is some version of: “My child is completely potty trained…as long as they’re naked.”
Say what?!
You may also hear this called bottomless time. A child spends a few days without underwear or pants, starts independently going to the potty, and everything seems to be clicking.
Then the parents put underwear or shorts on. Accidents. All. Day.
Take the clothes back off? Suddenly the child is using the potty again.
I have worked with hundreds of families over the past 10 years who tell me, “We did the three-day method,” or “We did the Oh Crap method,” followed by, “but we cannot get past the naked stage.”
I hear this pattern so frequently that I very rarely recommend extended periods of bottomless potty training. If I use it at all, it is typically very brief and after other approaches have been attempted. When a family comes to me after weeks of alternating between naked success and clothed accidents, one of the first things I usually want to change is that cycle and move away from naked time.
So, you’re probably wondering…why does this happen?
Here is the simplest way to think about it: Your child may have learned how to use the potty while naked. They haven't necessarily learned how to stay dry and use the potty while dressed.
To adults, those seem like the same skill. For a toddler, they can be surprisingly different. Children learn partly based on the cues that are present when they practice a skill. In behavioral psychology, we call this stimulus control. Don't worry—you don't need to remember that term.
Think about it this way. If your child practices hundreds of times under this condition:
Nothing on my bottom + I feel pee coming → go to the potty
They can get really, really good at that pattern.
Then suddenly we add underwear:
Underwear on + I feel pee coming → release where I am
For some children, having something snug against their bottom may feel more similar to the diaper-wearing condition they experienced for years. In other words, “something on my bottom” may still be associated with releasing pee or poop in place, while “nothing on my bottom” has become associated with going to the potty.
That means the child may not yet have learned the pattern we actually want:
Underwear on + I feel pee coming → hold it → get to the bathroom → pull clothing down → use the potty
That is a much bigger learning jump than it may seem.
Research on toilet training supports the idea that the conditions surrounding toileting, including clothing, can affect how children learn the skill, and that skills learned under one set of conditions do not always automatically transfer to another.[1–4]
“But she KNOWS she has to pee when she's naked!”
Exactly. And that's actually good information. If your child independently stops playing, walks to the potty, and pees when they are naked, they have already demonstrated several important skills:
They understand what the potty is for. They can release into the toilet. They are noticing some signal that tells them it is time to go. And they can act on that signal under certain conditions.
The problem isn't necessarily that they suddenly “forgot” how to use the potty when you put underwear on. The problem may be that the skill hasn't transferred to this new situation yet.
Clothing changes more than you might realize
When a child is naked, there is no clothing to manage. There is nothing touching their bottom. The physical sensations surrounding toileting are different.
Then we add underwear or pants.
For some children, simply having something against their body may change the cues they have been relying on. And remember: for the first two or three years of their life, having something on their bottom usually meant they were wearing a diaper, and they were allowed to pee or poop right into it.
I'm not saying your toddler is consciously thinking:
“Excellent. Underwear. This looks close enough to a diaper. Time to pee.”
Toddlers are not running that kind of elaborate potty-training scam (even though it really does feel like that sometimes).
But their learning history matters.
And clothing adds another whole set of skills
So when a parent tells me, “He NEVER has an accident when he's naked, but the second I put shorts on him, he pees in them.”
I don't immediately think: “He isn't ready.”
I often think: “He learned Step A beautifully. Now we need to teach Step B.”
Why families get stuck
There is another pattern I see all the time:
Naked → successful.
Underwear → accidents.
Back to naked → successful.
Try underwear again → accidents.
Back to naked again.
Understandably, parents keep returning to naked time because that's when their child succeeds.
But notice what the child keeps getting more practice doing: using the potty naked.
They're continuing to practice the condition they have already mastered instead of getting successful practice with the condition that is difficult—for both the child and the parents.
This is one reason I generally don't recommend continuing bottomless time indefinitely once a child is stuck in this pattern.
Okay, But How Do We Fix It?
If you've made it this far, you may be thinking:
“Oh no. Did I completely mess this up?” No. The good news is that your child has already learned some really important potty skills. Now we need to help those skills transfer to real life. And yes, often that means temporarily providing more support again while your child learns to stay dry with clothing on.
A few places I generally start:
1. Stop bouncing back and forth between naked and clothed
If your child has already demonstrated that they can reliably use the potty naked, continuing to spend weeks practicing naked usually isn't teaching the part they're struggling with.
At some point, we need to practice with clothing involved.
2. Make clothing easy
This is not the time for complicated buttons, tight leggings, overalls, belts, or anything else your toddler needs an engineering degree to remove.
Make it physically easy for them to succeed.
3. Expect that they may need more help at first
A child who independently initiated every time while naked may temporarily need reminders, support, or strategically timed potty opportunities when clothing is introduced. This doesn't mean you're going backward. You're helping them learn the skill under a new condition.
4. Reinforce the behavior you actually want
Make successful pee and poop in the toilet meaningful. For some children, praise is enough. Others benefit from a small additional reward while they're learning. I also like helping children notice another important success: “Your underwear is still dry!”
Because potty training isn't only learning where to pee. It's learning to stay dry until you get there.
5. Keep accidents boring
Accidents don't need shame, disappointment, or a five-minute discussion about where pee belongs. Be matter-of-fact, help them clean up, and move on. An accident gives us information about what the child still needs to learn.
Important Note About Constipation
Before assuming this is only a learning issue, I also want to know what is happening with poop.
Constipation and stool withholding can interfere with both bowel and bladder continence, and a child can sometimes be constipated even if they are still having bowel movements regularly.
If there is pain, withholding, unusually large stools, hard stools, stool smears, frequent small bowel movements, a history of constipation, or a sudden loss of previously established toileting skills, talk with your child's healthcare provider.
Stuck in the “potty trained naked, but not in underwear” stage?
I offer virtual potty coaching for families who need help figuring out what is keeping their child stuck and developing a step-by-step plan for moving forward.
References
Do disposable diapers reduce urination elimination signals in non-toilet-trained children?. Bladt L, Van Aggelpoel T, De Win G, et al. European Journal of Pediatrics. 2025;184(11):693. doi:10.1007/s00431-025-06542-6.
A Component Analysis of Toilet-Training Procedures Recommended for Young Children. Greer BD, Neidert PL, Dozier CL. Journal of Applied Behavior Analysis. 2016;49(1):69-84. doi:10.1002/jaba.275.
Toilet Training. Johnson CE, Burman NJ. Pediatrics in Review. 2026;47(5):290-293. doi:10.1542/pir.2025-006801.
Readiness signs used to define the proper moment to start toilet training: A review of the literature. Kaerts N, Van Hal G, Vermandel A, Wyndaele JJ. Neurourology and Urodynamics. 2012;31(4):437-440. doi:10.1002/nau.21211.