I have had an ulcer in my mouth for almost 1 month now. It hurt at first, but it doesn t now. The problem is it stays there for almost 1 month without any sign of healing . Its size is about 3-4mm. I can see its bottom is red, it s bordered with a quite yellow round. I went to several doctors including: dentist , cancer, dermatology doctors...but none of them had any doubt about it. They said it should be gone but it will take long to heal. I m really worried. I m living in Vietnam.
We can't tell you the position like this there can be so many differential diagnosis to find diagnosis you should post photo of ulcer, or you can get the biopsy of the little piece taken out that will tell you exact picture