From what she's said, people figured it had to do with her broken leg, but recently, Rachel tweeted out that her injury went beyond a broken leg and that she was currently in physical therapy trying to get better, but she never clarified what it was about, she simply said she wished she could say what it was all about. Today on Instagram, Rachel mentioned having to get surgery, but she didn't mention what kind of surgery it is, or whether it has to do with her injury or not, so I guess we will either never know, or she will end up telling a little more about it over time.