Skin Damage from 2nd Degree Sunburn While on Accutane

I my office, with your history, I would use Gentlewaves, mild topical cortisone cream for brief 3 day pulses, and cosmeceuticals.

Revale Night Cream, Neocutis BioRestorative Cream would be my two favorites, along with a good sunscreen like Anthelios. Good Luck.

Consider Aveeno Ultra Calming moisturizer with feverfew and SPF 15, daily. Dermalogica also makes several cleansers and moisturizers specifically for sensitive skin. In my experience, it can take more than just a few months for this Accutane-related redness and sensitivity to calm down. You might also consider treatments with vascular lasers including the pulsed-dye laser and IPL/fotofacial. Please consult with a cosmetically-oriented board certified specialist.
Good luck.

This can be a long-lasting problem but it will remitt.
You should be careful to constantly apply sunscreens, especially now that we are enterring the sunny months. Ultar-calming cream, as Dr. Chen mentioned, is also my favorite, RevaleSkin Day cream and Purpose Redness Relief are other options.
I think the Gentle Waves, an LED device, is very good for this problem. IPL treatments are also helpful, but the Gentel Waves might be better.
Again, as in many such situations, patience is key.