Kids get ringworm through direct contact with an infected person, an infected animal, or a contaminated surface. Despite its name, ringworm has nothing to do with worms. It’s caused by a group of fungi that thrive on skin, hair, and nails. Children are especially prone because of how much they touch, share, and interact physically with other kids and pets throughout the day.
Person-to-Person Contact
The most straightforward way kids catch ringworm is by touching someone who already has it. Fungal spores live on the outer layer of skin, and skin-to-skin contact transfers them easily. This is why ringworm spreads quickly in schools, daycares, and playgrounds where children are in close physical contact throughout the day.
Sharing personal items is just as risky as direct touch. Hats, hairbrushes, combs, towels, pillows, and clothing can all carry fungal spores. The fungi that cause ringworm can survive on objects for up to 18 months, which means a contaminated brush sitting in a shared cubby at school can infect a child long after the original carrier has moved on. Bedding and dress-up clothes in preschool settings are common culprits.
A large study of over 10,500 schoolchildren found that 6.6% had the ringworm-causing fungus on their scalps, with rates exceeding 30% at certain grade levels in some schools. Black children had the highest infection rates at nearly 13%, while rates for Hispanic and white children were closer to 1% to 2%. These differences are thought to relate to variations in hair care practices and scalp environment rather than any inherent susceptibility.
Pets Are a Major Source
Puppies and kittens are one of the most common sources of ringworm in children. Young animals are more likely to carry the infection, and kids tend to cuddle, kiss, and handle them constantly. Pet rodents like guinea pigs and rats also carry the fungus. The species of fungus that lives on cats and dogs spreads readily to human skin on contact.
A pet with ringworm doesn’t always look obviously sick. The telltale signs are patchy areas of hair loss with red, crusty, or scaly skin underneath, along with brittle or broken fur and nails. Some animals, especially cats, can carry the fungus without showing any symptoms at all. If your child develops ringworm and you have pets at home, it’s worth having the animals checked by a veterinarian even if they look fine.
Contact Sports and Shared Equipment
Wrestling and football carry the highest risk among youth sports because of sustained skin-to-skin contact. Shared mats, helmets, pads, and gym bags create additional opportunities for the fungus to spread. A child doesn’t need to touch an infected teammate directly. Sitting on a contaminated mat or wearing shared headgear is enough.
Health guidelines recommend that mats and high-use equipment be cleaned after every practice and several times a day during tournaments. Kids should wash workout clothes after each use in hot water, dry them on high heat, and never share towels, water bottles, or personal gear. Wearing sandals in locker rooms and showers also reduces exposure.
Soil and Outdoor Play
A less common but real route is soil contact. Certain fungal species live naturally in dirt, and children who dig, play barefoot, or handle soil regularly can pick up spores through small cuts or abrasions on their skin. This is more of a factor in warm, humid climates where the fungi thrive, but it can happen anywhere.
How Quickly Symptoms Appear
Ringworm on the body typically shows up 4 to 10 days after exposure. On the scalp, it takes a bit longer, usually 10 to 14 days. This delay means a child can be spreading the fungus before anyone realizes they’re infected.
On the body, ringworm looks like its name suggests: a red, circular, slightly raised ring with clearer skin in the center. It’s usually itchy. On the scalp, the signs are different and easier to miss. Children with scalp ringworm often develop flaky, scaly patches that look like dandruff, along with areas where hair breaks off close to the skin, leaving bald spots. Swollen lymph nodes at the back of the neck are a strong indicator. Scalp ringworm is the most common fungal infection in children and is frequently confused with dandruff, stress-related hair loss, or other scalp conditions.
Why Kids Are More Vulnerable
Children aren’t biologically weaker against these fungi, but their behavior makes them easy targets. They share hats and brushes without thinking. They wrestle and tumble with friends. They press their faces into pets. They sit on floors and mats that dozens of other kids have used. Every one of these moments is a potential point of transmission.
Warm, moist environments accelerate fungal growth. Kids who sweat heavily during sports, wear damp clothes for extended periods, or have small cuts and scrapes (which is most kids) give the fungus easier access. Tight clothing and headwear that trap moisture against the skin also create favorable conditions.
Stopping the Spread at Home
Once a child is diagnosed, ringworm on the body should be kept covered with bandages or clothing to prevent spreading it to siblings or classmates. Sheets, pajamas, and towels need to be washed daily in hot water and dried on high heat for the duration of treatment. Household surfaces should be cleaned and disinfected, and vacuuming helps remove skin flakes and pet hair that may carry spores.
Children with ringworm can return to school or daycare once treatment has started, according to the American Academy of Pediatrics. The infection doesn’t require a long quarantine, but keeping the area covered and maintaining good hygiene practices are important to protect other children. Personal items like brushes, hats, and hair ties should not be shared, and anything the infected child has used should be thoroughly cleaned or replaced.