What Causes Discolored Lips On A Puppy I Have A Discoloring On My Top Lip. What Sould I Do And What Could Be The Causes Of This?

I have a discoloring on my top lip. What sould I do and what could be the causes of this? - what causes discolored lips on a puppy

I do not take drugs, and I'm pretty sure that I have cancer of the lip.