This would be considered one of the possible responses to microneedling, and there can be a variety of reasons why your skin responded in this way. I would not get another microneedling treatment in the area, and would seek a local provider who has experience with hyperpigmentation. ...
First off, microneedling doesnt help pitted ice pick type scars --- these respond best to punch excision, TCA cross or a combination. Second off, acne scarring requires a combination approach of lasers, needling, and fillers. I suggest you only see a board certified dermatologist who...