Recommendation For Aft Treatment on Chest For Sensitive, Fair Skin?

I recently had a bad reaction to something, leaving my chest super red for 2 months and as a result the capillaries on my upper chest/lower neck were broken. Now I have pink skin on my chest due to broken veins. My derm said that this was actually sun damage and an aft treatment series (3) would fix me right up. I'm fair skinned and nervous as after reading all the bad stories of burns, etc. what is a mild setting for the chest to avoid burns? I have extremely sensitive skin....will hive up.

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