How do I treat this cigarette burn that I got last night? Will it leave a scar? (Photo)

I would recommend Melarase creams twice daily to help reduce the risk of post inflammatory hyper pigmentation. Best, Dr. Karamanoukian Los Angeles

I am sorry to learn of your recent burn. I would seek the care of a local physician who has experience managing burn wounds immediately. Treating the wound appropriately shortly after the injury can affect the final appearance. Best of luck.