Appearance: Pinworms are small, thin, white worms that resemble threads. Adult pinworms typically measure about 2-13 mm in length, with the females being larger than the males. The female pinworm has a pointed tail, which gives the worm its characteristic appearance. Pinworms are often visible in the stool or around the anus, especially at night when the female lays her eggs.
Lifecycle: The lifecycle of a pinworm begins when the eggs are ingested, usually through contaminated hands, food, or surfaces. The eggs hatch in the small intestine, and the larvae migrate to the colon, where they mature into adult worms. The adult female pinworm moves to the anal area, usually at night, to lay thousands of eggs, which causes intense itching. Scratching the area can transfer the eggs to the fingers, which can then contaminate surfaces or be ingested again, continuing the cycle.