What do do after skin has been burned from PicoSure procedure? 6 days post op. (photo)

I recently had Picosure procedure on my face to remove dark spots. The setting was to high and my face was burned. It’s been 6 days, the swelling has gone down and my face doesn’t feel hot anymore. My face is still bright red from the treatment/burn. My doctor says to keep my face moisturized with vitamin E oil. I am concern that this will cause discoloration (more dark patchy spots). What can I do to fix this to avoid discoloration?