After receiving permission from the Helsinki Committee and before beginning the process of subject selection, we will register our research study with the International Clinical Registration System (/http://prsinfo.clinicaltrials.gov). Then we will recruit 20 primary physicians who will volunteer to ask 200 patients each concerning recurrent canker sores in the mouth. (These patients will be those who come to the physician for other reasons.) Out of these 4000 patients according to the literature, 800 patients suffer from RAS. We expect that half of these (about 400 patients) will report that the problem exists and half of those will agree to participate in the research study. According to our estimate, about 200 patients will adhere to the inclusion/exclusion criteria.