I looked through this person's posts on instagram.
They look like they are either getting done up by a professional fx stylist, or they are a professional fx stylist.
The piercings are pretty easy to fake if you know how to use scar wax or liquid latex. Just cut a ring, or in this person's case a safety pin, so the part that would go through your skin is gone. Build up the area slightly with scar wax, because when you have a piercing it moves your flesh out of the way, and cover with foundation. Then attach the fake piercing to the skin with liquid latex. Then use more makeup to blend it.
Yes this is all done with makeup. Professionals who do fx makeup are really creative, and can do a ton with not much. Professionals in hollywood literally do magic. The zombies on the walking dead are a good example. If you want to see how this type of extreme makeup is done, look up the show Face Off.