If your toddler poops in underwear but uses the potty for pee, or your potty trained child poops in underwear after doing well before, you’re not alone. This often happens for specific reasons like stool withholding, fear of pooping on the toilet, constipation, or a learned habit—and the right next step depends on which pattern fits your child.
Start with what’s happening right now, and we’ll help you sort out whether this looks more like toilet refusal, poop withholding, constipation-related accidents, or a setback after potty training.
Many children learn pee and poop separately. A child who refuses to poop in the potty but pees in the toilet may feel more vulnerable during bowel movements, may want the familiar pressure of underwear, or may be avoiding pain after hard stools. In other cases, a toddler pooping in underwear after potty training may be dealing with withholding, constipation, or a routine that never fully shifted from pants to toilet for poop. The key is to look at the pattern, not just the accident.
Your child holds stool in, avoids the toilet, and then ends up pooping in underwear when they can’t hold it any longer. This can look like refusal, hiding, stiffening, or waiting until the last minute.
Your child is comfortable peeing in the toilet but will not poop on the toilet only in underwear or pants. This often points to a habit, fear, or strong preference rather than a lack of potty training skills overall.
A potty trained child poops in underwear even though they seem to know what to do. If stool is backed up, softer poop can leak out and look like repeated accidents, which needs a different approach than simple resistance.
A toddler poops in pants instead of potty but uses the toilet for pee with no problem. That split is common and can help narrow down what is getting in the way.
Some children go behind furniture, into a corner, or ask for privacy when they need to poop. Others only want to poop in underwear because it feels familiar and secure.
Toddler pooping in underwear after potty training can happen after constipation, travel, illness, preschool changes, pressure around toileting, or one painful bowel movement that made toilet poop feel scary.
If you’re wondering why does my child only poop in underwear or how to stop child from pooping in underwear, the most helpful advice depends on what is driving it. A child who is withholding needs a different plan than a child who simply prefers underwear, and both need a different plan than a child having potty training poop accidents in underwear because of constipation. A focused assessment can help you identify the likely pattern and choose practical next steps with less guesswork.
We help you look at signs that suggest toilet refusal alone versus signs that constipation or stool withholding may be part of the problem.
You’ll get clear, supportive guidance on routines, language, timing, and how to reduce pressure while still moving toward toilet poop success.
If the pattern suggests pain, chronic constipation, or frequent soiling, the guidance can help you recognize when it makes sense to involve your child’s pediatrician.
This is a very common potty training pattern. Peeing and pooping use different body sensations and can feel emotionally different to a child. Some children are afraid of releasing poop into the toilet, some prefer the familiar feeling of underwear, and some are avoiding pain from constipation or a previous hard stool.
It can happen, especially during transitions, after constipation, or when a child has learned to use the toilet for pee but not yet for poop. Repeated poop accidents in underwear are worth paying attention to because they often follow a pattern that can be addressed with the right approach.
The best next step depends on why it is happening. If your child is withholding, pressure can make it worse. If constipation is involved, behavior strategies alone may not solve it. If it is a toilet refusal pattern, gradual practice and reducing fear may help. Personalized guidance can help you choose the right strategy instead of trying random fixes.
A setback after earlier success can happen after a painful bowel movement, constipation, schedule changes, stress, travel, or preschool transitions. When a child used to poop in the toilet but now has frequent accidents in underwear, it is helpful to look for signs of withholding or stool backup rather than assuming they are being defiant.
Consider checking in with your pediatrician if your child has hard or painful stools, goes many days without pooping, has belly pain, has frequent skid marks or leakage, seems to be withholding regularly, or the problem is continuing despite consistent support at home.
Answer a few questions about your child’s current pattern to get a focused assessment and practical next steps for toilet refusal, withholding, poop accidents after potty training, or constipation-related soiling.
Answer a Few QuestionsExplore more assessments in this topic group.
See related assessments across this category.
Find more parenting assessments by category and topic.
Potty Training Poop Issues
Potty Training Poop Issues
Potty Training Poop Issues
Potty Training Poop Issues