Hello,
I have a reoccurring perfectly round crater-like sore on my gums that is incredibly painful. It's never in the same part of the gums twice and there is always a dimple right in the center of it. It starts off as a small round cut with yellowish liquid that comes out if pressure is applied on it and then it expands into the white, perfectly round spot. It's not near the base of my teeth on my gums. I've had this three times so far in the course of 9 months and it is always just one singular sore every time. The ulcer usually lasts for about two weeks. I have also tested negative for HSV 1 and 2, with the last test being last month. I don't have braces, chew tobacco, or smoke. I also brush and floss regularly, use mouthwash, and have never had any teeth or gum problems before. I don't have any other symptoms besides the sore when it occurs. I've had canker sores before, but they have never been on my gums and they never have liquid come out of them. My canker sores are also never perfectly round with a small hole-like dot right in the middle like these sores. What could this possibly be? What do I need to do? Thank you!