This is depends on cause.
If threadworm is suspected then treatment with mebendazole.
If clinical examination in an adult reveals excoriation and nil else then treat with a combined steroid / antibiotic / antifungal preparation (e.g. Tri-adcortyl cream) and review.
Add information to this page that would be handy to have on hand during a consultation, such as a web address or phone number. This information will always be displayed when you visit this page