I've experienced this as a young nurse and aide mostly with older women . It isn't even personal it's just sometimes they feel because of their age their more experienced . I agree with the other comment though bringing up the age difference or her age in general to coworkers or management will back fire but I believe kill her with kindness , ask her if she's having a bad day. Just like with patients , there sometimes is an underlying problem that most likely has nothing to do with you personally . Be patient and give her space . Hope everything works out .