Skid Marks in Your Child's Underwear: Wiping, Leaking, or Something More?

Another pair of stained underwear in the laundry. Maybe your child is five and "should know better." Maybe they insist they did not feel anything. Before anyone gets blamed, it helps to know that skid marks have two very different causes, and the one that worries parents most is the one that is least within a child's control.

Cause 1: wiping that is still a work in progress

Children learn to wipe later than most adults expect, and many do it badly for a long time: too little paper, a hurry to get back to playing, a reach that does not quite get there. The result is small, dry-ish streaks in a child who otherwise poops normally.

What it looks like: light brown marks, usually after a known poop, in a child who poops regularly and comfortably and does not seem unaware of it.

What helps: flushable wipes or damp toilet paper, the "wipe until the paper is clean" rule, a quick check-in after poops for a while, and no fuss. Standing to wipe is easier for many children than reaching while sitting.

Cause 2: overflow, when stool leaks around a backed-up bowel

This is the one to understand. When a child holds poop or is constipated, stool collects in the lower bowel and the bowel stretches to hold it. Two things follow. The stretched bowel sends weaker "time to go" signals, so the child feels the urge less. And softer stool from higher up leaks around the retained mass and out, often without the child noticing. Pediatric guidance describes this overflow soiling as the usual mechanism behind encopresis, and the American Academy of Pediatrics is clear that it is involuntary.

What it looks like: frequent stains that are soft, pasty, or liquid; a smell the child seems not to notice; stains at times when no poop has happened; long gaps between proper poops, or large, hard poops when they come; a child who is holding, crossing legs, or avoiding the toilet; sometimes a swollen belly or poor appetite.

What helps: a pediatrician. Overflow does not resolve with wiping lessons or consequences, because the child cannot feel it coming. The treatment, guided by your child's doctor, typically addresses the backed-up stool first and then keeps poops soft and regular while the bowel recovers its signals. The NASPGHAN/ESPGHAN guideline and NICE guidance both describe this approach; the specifics, including any medication, are decisions for your pediatrician.

How to tell the two apart

If more than a couple of answers fall in the right-hand column, assume overflow until your pediatrician says otherwise.

Keeping shame out of it

Children with overflow soiling are often blamed, teased, or punished, and the shame makes everything worse: a child who is ashamed hides underwear, avoids the toilet more, and holds longer. Whatever the cause, the message at home is the same.

• Neutral words: "Some poop got out. Clean underwear time." Nothing else.
• No punishment, no consequences, no "you're too old for this."
• A practical routine your child can manage: a bag for soiled underwear, spare clothes at school, wipes in the bathroom.
• Privacy from siblings. Stains are not family news.
• If your child is old enough, a simple explanation: "Your body got a bit backed up and some poop sneaks out. It's not your fault, and the doctor can help it stop."

What to track before the appointment

Your pediatrician will want a picture of the last couple of weeks: how often your child poops, what the poops are like, how often and when stains happen, whether your child notices, and any holding or tummy pain. A week in the free Poop Tracker gives you that, and the Pediatrician Visit Builder turns it into a one-page summary with questions to ask.

What to expect from treatment

Overflow soiling is very treatable, and the plan usually has three parts your pediatrician will tailor: clearing the backed-up stool, keeping stools soft and regular long enough for the bowel to recover, and a calm toilet routine, typically sitting after meals with feet supported. Leakage often continues for a while after treatment starts, because the bowel needs time to shrink back and regain sensation. Every child is different. Some patterns shift within a couple of weeks once pressure comes down; long-standing withholding or constipation usually takes longer and often needs a pediatrician alongside behavioral changes.

When to call the pediatrician

Stool leaking in a child who was trained is itself a reason to call. So are the other warning signs below. If skid marks are frequent, soft, or unnoticed, make the appointment; it is far easier to treat overflow early than after months of holding.