Why is my face so red after dermarolling? Classify my acne scars?

Hi Last year, I got tired of my acne scars and decided to get Fractional RF professionally done. I got 2 of them done (after 6 months of going off accutane) but the therapist recommended dermal rolling which is when my face got extremely red. I have attached a photo before getting the treatment. Now, after 1 year my face is still red. The photo (right, left) is just from 10 minutes of sun exposure. I have a proper skincare regime, spf 50+ no less. What can I do to reduce the redness? Thanks