Hey,
I'm having the exact same problem, however I'm still smoking. If you've found out what it is, please met me know as soon as possible.
Thanks!!
Kat
Hello and hope you are doing well.
The white patch and the bump may need to be properly investigated by an ENT specialist. He will do a complete examination and if needed may take a biopsy. A biopsy facilitates a histologic study of cells, which gives you a definite diagnosis. Please consult to clear your doubts.
Hope this helped and do keep us posted.