Pinworms are small, white worms that live in the intestines. They are most commonly found in children, but they can also infect adults. Pinworms can cause itching and irritation around the anus, and they can sometimes lead to more serious health problems. Checking for pinworms is a simple and painless procedure that can be done at home.
The most common symptom of pinworms is itching around the anus. This itching is usually worse at night, when the worms are most active. Other symptoms of pinworms can include: