Unfortunately, repetitive strain injuries seem to be one of those things that you're prone to or not. I have some sort of injury in both wrists (officially carpal tunnel, but who knows), and I started getting symptoms by 12-13 just from writing by HAND. Never mind typing. She's likely not going to find relief simply by changing her work station once. She's going to have to change it up constantly. It's probably going to be a lifelong issue for her. Being careful about the strain she puts her wrists under is something OP needs to tell her to constantly watch, or she will end up in braces and high levels of pain for months on end from pushing it.