Thanks for posting,
Well, thinking of cancer will depend more on your age ( anything is possible when it comes to the human body) as a more advanced age will more likely be cancerous or precancerous lesions. From your description, I do not think it is cancer-related lesion and I suggest you get yourself examined by a physician who can look at it closer and decide what to do.
It could be fungi (candidiasis
) and may just require antifungal medication like fluconazole
If you are in doubt, just consult a doctor.
Hope this helps