I have been dipping since January maybe, I'm 15, and sometimes II get sores, they go away though thankfully. I'm 6 feet, 4 inches. 270 pounds. I am literally finish this can off tomorrow, then I'm done with the stuff. Do you think I could have cancer? I have no real medical history, I got Pneumonia when I was in Kindergarten and when I was younger I had tubes put into my ears because I got infections a lot. I am a little overweight.