When someone scratches the itchy area, microscopic pinworm eggs transfer to their fingers. Marks, md, is a board-certified internist and gastroenterologist. However, people experiencing chronic anal itching, or itching accompanied by other symptoms, should discuss the symptom with a physician to determine the underlying cause. Children may reinfect themselves by transferring eggs from the area around their anus to their mouth. As adults, the female pinworms move into the colon and exit the body through the anus.
Why are pinworms so itchy at night?
How threadworms spread
They can spread the eggs to others directly through their hands, or through contaminated clothing, bedding, food, or other articles. Tell the pharmacist if you need to treat a child under 2, or if you’re pregnant or breastfeeding. The stool sample is sent to the laboratory for a detailed analysis.