Erythema After CO2 Laser Resurfacing? Can I Use Hydrocortisone 1%? (photo)

 This is nothing to worry about. Judging from your skin type and recent lack of sun protection, I suspect that you may hyperpigment. Both the redness and the hyperpigmentation will eventually resolve spontaneously but I would use hydrocortisone, sunscreen and probably a bleaching agent at some point.

The area of erythema looks like freshly lasered skin albeit more red than it should be at this point.  First, you should check with the doctor who did the procedure.  Only an examination can determine if something else is going on such as an infection.  Hydrocortisone cream (assuming there is no infection) can decrease the redness initially but can thin the skin and make it look more red if used for more than a few days.

Good luck.