Frowning, Hermione regarded Ron with a perplexed look. Given the severity of what he likely experienced at Umbridge's hands, she couldn't understand why he wouldn't seek the help being offered to him. If their roles were reversed, she certainly knew that she would have been in the hospital, as soon as she was allowed, and having her wounds and other ailments fixed. She wouldn't attempt to doctor them herself, not when they could get infected and make things worse. Unlike Ron, it seemed, she wasn't that proud.
"You might very well lose your leg if you continue to let it go un-mended," she said and shook her head. "There is no sense in being stubborn or illogical - they don't have cooties, or anything of the sort. There isn't even such a thing!"