You notice it around bedtime. Your child is restless, fidgeting, maybe waking up crying. You check on them and realize they’re scratching — around their bottom, uncomfortable and unsettled. Your stomach drops a little. What is that?
First: take a breath. If your child is scratching at night, especially around the anal area, pinworms are one of the most likely explanations. And while the thought might make you squirm, pinworms are one of the most common childhood infections in the world. Millions of families deal with this every year, and it’s completely treatable.
Here’s how to figure out if that’s what you’re dealing with — and what to do about it.
Why Pinworms Cause Nighttime Itching
Pinworms are tiny white worms, roughly the size of a staple, that live in the lower intestine. During the day, most infected children have no symptoms at all. But here’s the thing: female pinworms are nocturnal. At night, they crawl out to lay eggs around the outside of the anus.
This egg-laying process is what triggers the intense itching. The eggs — and the movement of the worms — cause irritation that tends to peak in the middle of the night or early morning. That’s why kids who are fine during the day suddenly become uncomfortable once they’re in bed.
Signs That Point to Pinworms
Beyond the classic nighttime scratching, here are other signs that suggest pinworms might be the cause:
- Restless, broken sleep — your child wakes more than usual, seems uncomfortable
- Irritability or crankiness the next day, especially if sleep was disrupted
- Scratching that seems focused on the anal area or, in girls, around the vaginal area
- Visible worms — small white threads on the skin around the anus or in the toilet, most visible at night with a flashlight
- Complaining of a sore or itchy bottom without any visible rash or skin irritation during the day
What You Can Do Tonight
If your child is scratching right now and you’re reading this at midnight, here’s what to do:
Grab a flashlight. Wait about an hour after your child falls asleep, then gently check the skin around the anus. Female pinworms are about 8–13mm long and appear as tiny white threads. They’re visible to the naked eye in good lighting. If you see them, you have your answer.
Do the tape test in the morning. If you don’t see worms with the flashlight check, try the tape test first thing tomorrow — before your child gets up, uses the bathroom, or bathes. Press a strip of clear tape against the skin around the anus and stick it to a glass slide or plastic bag. A doctor can examine it under a microscope, or you can check it yourself with a magnifying glass in bright light.
Other Reasons Kids Scratch at Night
Pinworms are common, but they’re not the only explanation. A few other things can cause nighttime itching in kids:
- Bubble bath or soap irritation — products with fragrances or dyes can irritate sensitive skin
- Dry skin or eczema — especially in drier months
- Stool residue — incomplete wiping can cause irritation that’s mild during the day but noticeable at rest
- Yeast or bacterial skin irritation — particularly in girls, vaginal yeast can cause perianal itching
- Threadworms in specific regions — if you live in or have traveled to a tropical region, other intestinal parasites are worth ruling out
If the itching is happening during the day too, or if there’s visible redness, swelling, or discharge, it’s worth calling your pediatrician to rule out skin conditions or other infections.
When to See a Doctor
Most pinworm cases don’t require a doctor visit. But reach out to your pediatrician if:
- Your child is under 2 years old (treatment for very young children should be guided by a doctor)
- You see signs of a skin infection — redness, swelling, or broken skin from scratching
- The itching is also happening in the vaginal area and there may be a secondary infection
- You’re not sure what you’re seeing and want a confirmed diagnosis
Otherwise, pinworms can be treated at home with over-the-counter medication.
What Happens Next
If you confirm pinworms — or if the signs are clear enough that you’re confident — treatment is the logical next step. Over-the-counter pyrantel pamoate has been the go-to treatment for pinworms for more than 50 years. It comes in liquid or chewable tablet form, is dosed by weight, and is considered safe for children 2 years and older.
One important note: a single dose isn’t always enough. Because pyrantel pamoate kills the worms but not the eggs, a second dose two weeks later is recommended to catch any worms that hatched from eggs after the first treatment. This two-dose approach significantly reduces the chance of reinfection.
You’ll also want to treat the whole household, wash bedding in hot water, and keep everyone’s fingernails short and clean while treatment is underway.
You’re Not Alone in This
It’s genuinely startling to realize your child might have worms. But here’s the thing: this happens in clean homes, careful families, and well-run daycares all the time. Pinworms spread through microscopic eggs that are invisible to the eye — it has nothing to do with how well you clean your house or how carefully you watch your kids.
The fastest path forward is confirming the diagnosis and starting treatment. Most families are through it within a few weeks, and many barely remember it happened.
Tropical Consumer Health
All content at Tropical Consumer Health is reviewed for accuracy. This article is for informational purposes only and is not a substitute for professional medical advice.