Thank you for writing to just answer with your health concern.
Young children are often the ones who get them, usually in day care. Do you have a grandchild coming in to your home? Also vacuum the furniture, if you have not done this.
Additionally, you could have rid yourself of them, but have rectal itching remaining. A way to check to see if you do have pinworms for sure still is to place a piece of cellophane type over the area at night. The article below explains the exact procedure.
If there are no eggs or pinworms and the rectal area is irritated, your may want to try a hydrocortizone cream to the area.
The article below has several pages, but I am giving you a link to the page with the mediacations. If you have tried the medications that you can buy over the counter, you may need to see your physician for a prescription medication. See: http://www.medicinenet.com/pinworm_infection/article.htm
http://www.cdc.gov/ncidod/dpd/parasites/pinworm/factsht_pinworm.htm -Has specific guidelines for removing pinworms from the home.
If you find you are having difficulty with rectal itching and don't have pinworms, hemorroids and constipation, yeast infections are some other problems that can cause itching.
I hope this helps.
If you have questions or comments, please reply so that we can address them.