What will happen if you don't treat pinworm?

Annoying symptoms: Pinworm infestation causes the annoying symptoms of rectal itching, usually at night, and if not treated, one keeps reinfecting oneself by scratching and ingesting the eggs that were deposited when the worms come out at night to lay eggs. An uncommon complication happens if the worms get stuck in the appendix, leading to acute appendicitis that would need surgery to remove the appendix.