Have small white line inside my cheek I can only feel when I touch it with my tongue bit it is irritating I am concern that it may not lead to some serious issue .i have this line from last 6 days and I smoke cigarette.

Dear lybrate-user, Smoking is one of the reasons for mouth cancer. White line is one of the indication of cancer occurring. Your white line may or may not be a precancerous white line. Always it is better to know early at pre cancerous stage so that it can be treated without any complications. Please consult a dentist or head and neck cancer surgeon for a biopsy - a small bit will be taken and sent for detecting cancer cells. Even if it is non cancerous white line, it is better to stop smoking. It may at any time become cancer if you continue smoking. All the best.