TCA cross brown spots around scars. Normal? (photo)

I had the TCA cross done 2 days ago. Doctor only use 50%. I am left now with brown spots around the treated area. I was told not to do anything on the first night or use cetaphil to wash face for 1-2 days. I know the scar itself will scab over time but I am not sure what happen to the surrounding area. Did feel that some solution may have spill outside the actual scars. Will these brown markings go away???? What should I put on them, to make them go away faster?