What are pinworms and how to treat them Children's Wisconsin
At Every Turn > Primary Care > Pinworms in kids: Don’t be frightened, they are common
Tips Feb 19, 2018

Pinworms in kids: Don’t be frightened, they are common

Landon Krantz, MD, Pediatrician

Parents often find them gross. They freak out about them, and sometimes are even too embarrassed to ask the doctor about them. But don’t be frightened, they’re common!

I’m talking about pinworms. Pinworms are a form of intestinal parasite that look like pieces of dental floss. Up to half of kids, typically between ages 5 to 10, will get a pinworm infection at some point, according to the Centers for Disease Control and Prevention. It is the most common parasitic infection in the U.S.

What to watch for

The most common symptoms are an itchy bottom and restless sleep. The itching is worst at night because that’s when the worms crawl to the area around the rectum to lay eggs.

1

You’ll likely find the worms in the anal region a few hours after your child has fallen asleep or on your child’s underwear in the morning. You may also see them in the stool.

How the infection spreads

Parents often ask, “How did my child get this?”

When kids itch an infected area (often their bottom), the microscopic eggs end up on their fingers. And if they don’t wash their hands, contaminated fingers can carry the eggs to the mouth.

When kids ingest the eggs, the eggs go into the intestines and grow for about two to four weeks before becoming worms. The worms lay eggs near the anus, and the cycle repeats.

The microscopic pinworm eggs can also lurk on surfaces such as bed linens, towels, clothes, toilets, food, toys and school lunch tables. If one child gets an infection, there’s a good chance it will affect the rest of the family too.

How to treat pinworms

The good news is pinworms pose little danger and can be addressed quickly. Infected kids take one tablet to kill the worms and another in two weeks to kill the eggs. The treatment is almost 100 percent effective.

2

I recommend the whole household gets treated to prevent kids and adults from being re-infected with pinworms.

Prevention

Parents want to do everything they can to prevent pinworms, but unfortunately there’s no way to completely prevent all infections. Here are a few things you can do to decrease the chance of getting or spreading an infection:

  • Wash your hands often and remind your kids to do the same, especially before eating and after using the bathroom.

  • Wash your child’s pajamas every few days.

  • Clean toys and surfaces regularly.

  • Remind kids not to scratch around their bottom or bite their nails.

Landon Krantz Landon Krantz, MD Pediatrician Lakeside Pediatrics (262) 652-9430
Children’s Wisconsin has more than 20 primary care offices conveniently located throughout the Milwaukee area and southeast Wisconsin. Find a pediatrician near you. View more articles from Landon Krantz, MD

Related stories

Measles outbreak United States 2025 Children's Wisconsin
Tips Feb 21, 2025

Measles outbreak shows importance of getting your kids vaccinated

Renee Szafir, MD Pediatrician

The recent measles outbreak is a regrettable reminder to all of us of just how preventable this disease truly is when your child is vaccinated.

Tips for adopting a dog with kids Children's Wisconsin
Tips Feb 12, 2025

Furry Friends: How to Safely Introduce a Dog Into Your Family

There are some things to consider before introducing a dog to your own family.

Autism Spectrum Disorder Children's Wisconsin Center for Child Development
Tips Jan 29, 2025

Understanding the Autism Spectrum

Erin Long, PhD Clinical Psychologist

Autism is an extremely diverse spectrum, and every person is different in terms of their strengths, challenges and interests.

Picky Eaters, Selective eating, ARFID Children's Wisconsin
Tips Jan 22, 2025

Food Fuss: When Picky Eating Is Something More Serious

Meghan Wall, PhD Pediatric Psychologist

Many children are picky eaters, but sometimes what seems like pickiness could be something more complex.

What Parents Need To Know About the Red Dye No. 3 Ban Children’s Wisconsin
Tips Jan 16, 2025

What Parents Need To Know About the Red Dye No. 3 Ban

Becky Plier, RD, CNSC Clinical Dietitian

The Food and Drug Administration (FDA) has banned the use of red dye no. 3 in any food and drugs.

Working moms and breastfeeding Children's Wisconsin
Tips Jan 14, 2025

Working Moms: What’s Your Plan To Continue Breastfeeding?

Jessica Schilz, RN, IBCLC Lactation Consultant

Workplaces are now more supportive of breastfeeding than ever.

Top concerns for breastfeeding moms Children's Wisconsin
Tips Jan 08, 2025

Top 4 Breastfeeding Concerns and How To Address Them

Jessica Schilz, RN, IBCLC Lactation Consultant

As natural as breastfeeding is, it does not always come easily to a new mom or baby.