I have what looks like a raw, whiteish-gray sore in the crease between the bottom of my gums and cheek on the right side.  What concerns me is that it is swollen and tender both at the spot and under my jaw.  My lymph nodes are also swollen and tender.  What should I do about this and should I be concerned?
Hello:)Welcome to Chat Doctor. This is a mouth ulcer. Many reasons can contribute to ulcers, however treatment is symptomatic. Apply qua Chat Doctor. Gargle warm saline daily. Check if you are on low iron levels. Maintain a proper oral hygiene. Regards.