Laser Tattoo Removal Scarring (Redness)

Hi, I had a laser tattoo removal that has left some redness scarring. It was 3 months ago that I had the session and I believe the practitioner was too aggressive with the laser for the first session. I had another laser removal session in a different area 6 weeks later and there is no scarring from this treatment, it was a better clinic and the practitioner was certainly more gentle with the laser. My question relates to understanding what happened to my body cause the redness scarring and if there's anything I can do to help it heal? The redness is very slowly reducing, but I've noticed that if the skin in that area is exposed to sun rays in a hot climate. It goes red very quickly, like sunburn but much faster. The other laser treated area does not react this way and copes fine when in sunlight. Any advice would be much appreciated. Thanks