What happens to an adult if they have thread worms?

If an adult has threadworms, also known as pinworms, they may experience itching around the anus, especially at night when the female worms lay eggs. This can lead to discomfort, insomnia, and secondary infections due to scratching. In some cases, there may be no noticeable symptoms, but if left untreated, the infestation can persist and potentially spread to others. Treatment typically involves over-the-counter or prescription medications to eliminate the worms.