Hi doctor, I have cigarette burn on my chest 6 months ago. I haven’t checked it to doctor. I used savlon to clean the wound/burnt area to take off residues & also when blister is broken/rupture or when i see black color(residues i think) on the wound. Its healed now But i got a protusion/lump on the burnt area when its getting healed and Now its probably 2mm . How i can make it normal & same as my skin color. What treatments are available? How long will it take?