Hi, I need some suggestion. I'm 23, a student and been smoking and consuming gutkha for the past 3 years then I stopped both since last 4-5 months. Then since last 4 days my upper part of the inner mouth has been swollen a little but i'm uncertain if it's caused by infection or it's an ulcer or canker sores. I've never visited a dentist but now for the sake of my health i'm planning on visiting a dentist. Now i'm worried hope it's not cancer.