It's hard to get a pic that captures it well but here is one: https://imageshack.com/i/po60iGLej
I've been told it's either hairs trapped under the skin or open comedones. The technician did find tiny hairs under some. I'm not sure if electrolysis is even effective for either of these things. I can see areas that are 100% clear. Not sure if they always were that way or if it is a result of the treatment.