Why do I have tiny blisters on my face from PicoSure? (Photos)

I did a full face picosure procedure on Monday (6 days ago). The next day, my face was full of tiny red blisters that have itched so much. Over the day, the blisters have had pus in them. I have been very thorough with cleaning my face and only using soft, hypoallergenic solutions. I have also used 110 spf. I have not popped any of the bumps, but I am concerned for my skin. I did not have any breakouts prior to the procedure. I did the picosure to help treat previous scars and fine lines.