The top of my gums below my bottom row of teeth, only in the front, are white. i had leukoplakia on my tongue that went away. do i have cancer or a disease?

No: Leukoplakia is your epithelial response from a chronic irritation of a tobacco product (chewing or smoking. Leukoplakia is a white patch that cannot be rubbed off with a gauze. It is not cancerous, however, be careful it it is transform into erythroplakia which is a red patch. This indicated perusion of blood vessel before a growth of lesion occur. Stop smoking or chewing tobacco.