It can take up to 16 weeks in some cases for aldara to be fully effective. Let your doctor know what's happening re: the sore. This is not uncommon with aldara, and sometimes a "rest" period is recommended. Don't stop the cream without checking with your doctor or pharmacist first to see what they say. The sores will heal either with the rest period or when treatment is over.
You can also read more on the product site www.aldara.com
. 1-800-328-0255 is their customer service number.
Post again if more questions come up.