Rhys was in pain... like, quite a bit.
She had welts all over her body that were putrid, green, and hurting. So she was in the library, looking up what kinds of creatures in the forbidden forest appeared only to girls, and looked like tiny fairies that giggled until they stung you. So far it wasn't going well.. She couldn't find ANYTHING about them in any books she found about the forest around Hogwarts. So far she could tell that researchers went in there regularly, and never came out. Her experience in there was extremely lucky, and maybe perhaps she had been saved a bit by Felix Barker, who had kept the worst of it away.
She couldn't go to the Hospital Wing either, they would ask.. they would always ask how she got the wounds, and as far as Rhys was finding, no one knew what they were, so she would need to find out how to cure it on her own. Which sucked, because she had a lot of school work to do. But instead, she was curing her own wounds, wounds she couldn't show off, so she simply put band-aids over them, and made it look like she just liked the look of the band-aids, or told people she had fallen down the stairs and didn't like the potions she got for the bruises, every time it was a new excuse, and she was running out, and forgetting which excuse she had told to whom, so she sat in the Library, pouring over books of forgotten creatures, special potions, and just about everything that didn't interest her, she was learning, so she could use it on HERSELF and try and figure out what it was that was hurting her.
In front of Rhys sat a vial, a vial that was filled with the puss, or whatever it was that had come from her wounds. It was bright green, and almost seemed to glow, she stared at it, and then at the potions book in front of her. Apparently if she put a special potion into the mixture, she could find out just how poisonous it was. She knew she needed to make this potion, but she wasn't the best potion maker.. she'd need to find someone.. anyone who knew more about this stuff then she did, that she trusted enough to let them see her wounds.