a mental illness resulting in high levels of anxiety, unreasonable fears and behaviour and, often, a need to repeat actions for no reason

If you want my opinion, I think she's suffering from some form of neurosis. 如果你想听听我的意见，我认为她患有某种神经官能症。

She's obsessively clean - it's almost become a neurosis with her. 她有洁癖——几乎到了神经过敏的程度。