Can you not smell yourself?

One of my students smells bad, VERY BAD. She smells like she urinated on herself, and has been wearing the same clothes for a few days, in the middle of summer. Nasty, just nasty. I don't know what it is, everyday she wears different clothes. They look clean. If I was someone else, I'd say something to her. But I try to make everyone feels comfortable in my class. Even if you smell.... BADLY. I'll act like I don't smell anything. But with this lady... whew! There are times I thought I would gag, but I held it in. It wouldn't bother me so much, except that when she asks for help, it's always a bunch of questions right after the other. DAMN! Give me a break between questions or something. Let me get a nice lung-full of clean air, and then I'll be right back to help you.

I just hope it's something that she can correct, not like that's her "normal" body odor. Maybe I'll talk to her one of these days.