While I'm not up on recent events, to the best of my knowledge, Rachel has never lost her scars (I believe that's what they're supposed to be, although they do look like tattoos here). She just conceals them through the use of illusion. A good way of telling when she's just lost control of a situation (or is diverting all of her power into something else) is when she lets the illusion slip, and her scars show.