The conversation between human and AI assistant.
[|Human|] Bump on lip I had a bump on my lower lip like a cold sore about three weeks ago and now for the past week I have had a bump on my top lip. It looks as though its going away but is dark like it will leave a dark mark. Iam 36yrs old, Male, I smoke ciggarretes daily and I drink beer twice a week. I also drink coffee every morning and I have a dog.
[|AI|]  Hi Dear, Welcome to Chat Doctor. Understanding your concern. Thanks for your query. The probable reason for bump on your lip is canker sore or cold sore. There can be many factors responsible for canker sore like stress (very common), irritation of mucosa due to food, fruits and Chat Doctor. They usually go away by their own without any treatment in week or two or by avoiding trigger factor. I would suggest you to apply some antimicrobial ointment, start multivitamin supplement containing vitamin B12 and folic acid, quit smoking and 
