Folliculitis after LSR? Or just a breakout?

I had a Picosure LSR treatment two days ago and whilst my redness/swelling has settled, yesterday I started breaking out on my forehead and cheek. It has now gotten worse and many small pustules have formed in these areas. They are swollen, hot, red and itchy. The doctor has given me oral flucloxacillin & a hydrocortisone ointment. Is this folliculitis or is it to be expected after treatment? I don't normally suffer from acne. I am not sure what post care I should be using now?

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