C.P.
Hello C.,
if she takes allergy medications, that could be one of the side effects. if so, talk with her doctor about switching. try also using some essential oils like lavender. use music, rub her feet and ankles and her hands/wrist/foreams to help her relax. you might not want to tell her at first that is to get her to sleep. also, when my son does that is when he needs to talk usually nothing in particular ... just a friendly ear and then he gets back to sleeping OK. also, make sure she's not getting any caffeine and no tv/video games after 7pm. Good luck!
~C.~