Pinworms are small, thin, pin-shaped worms that sometimes live in the human colon and rectum. They're also called threadworms. They're about 1/4- to 1/2-inch long — about the size of a staple.

Pinworms are tiny worms that can cause an infection in the intestines ... If your child has a pinworm infection, the doctor will recommend an over-the-counter or prescription antiworm medicine. This ...

Pinworms are tiny worms that can cause an infection in the intestines ... If your child has a pinworm infection, the doctor will recommend an over-the-counter or prescription antiworm medicine. This ...