I would not ask her. I am an intern therapist who also has problems with SI. When SI, I normally do it in places that cannot be seen. There are times when in the moment, I have not consciously realized what I was doing, and made a cut on my wrist or my arm. I have had to put a bandage. When people ask me, "What happened?" I get very, very, very uncomfortable. The chances that something other than SI happened to cause her to put a bandage are pretty high-- but you never know.... and you do not want to make her uncomfortable. Maybe she got hurt, fell, needed stitches... and she looks tired because she had to get it taken care of. I am living proof that it is possible to slip (a lot) and still be able to do work with patients. Is there any reason besides the bandage to think that your T SI'ed? Has she talked about that before?