1 session of tattoo removal on black skin. I'm having troubles with holes forming in my arm (Photo)

Ok my friend has just open up a tattoo removal studio... She offer to remove my tattoo for free as she had never done the worked on black skin before and it was a test for her I was healing very well untill after last weekend when I stared to see the skin a form wholes in two areas and the skin seemed to be parting.. their is no pain and just worried about having holes In my arm.. I have a cream from the pharmacy to stop infection.. but don't no if I need more