The most common signs of a pinworm infection are:
The itching is usually worse at night because the worms move to the area around the anus to lay their eggs (up to 10,000 to 15,000 eggs). In girls, pinworm infection can spread to the vagina and cause a vaginal discharge. If the itching breaks the skin, it also could lead to a bacterial skin infection. Pinworms can also cause bedwetting at night.
Some infected people have no symptoms at all.
