I have a red area over my uvulva with one white ulcer there, what could that be and i always breath throw my mouth bec my nose is blocked.?

Need to be examined: The lesion needs to be examined by a physician to determine the cause of ulcer and prescribe proper treatment. It is not feasible to provide a meaningful opinion without examining the affected part. See this site for more information on this topic and see a doctor as soon as possible. http://www.nlm.nih.gov/medlineplus/ency/article/003222.htm.