Today I visited a dentist. It didn’t look suspicious to her (even though it hasn’t healed within 6 months?), she refused to take a biopsy and claimed that I probably brush my teeth too hard. That’s not the case. I’m worried about this ulcer. My grandmother died from mouth cancer and my mother was diagnosed with advanced lung cancer last month. What should I do?
(Btw, those brown spots on my teeth result from mouthwash.)