What can i do if my right hand is cold and numb - could this be raynauds syndrome?

Raynaud's: Raynaud's syndrome is a spasm of the small vessels of the hands most often related to cold weather, emotional stress, or a multitude of other factors. Classically it is described as cold hands which first turn "ghost white" and then become purplish in color, most often trigged by the cold. This usually gets better when the hands are warmed. At worst it can cause ulcerations of the fingers.

Right hand: it is unlikely that raynauds will only effect one hand. It is more likely that there may be a thoracic outlet syndrome with nerve compression that is causing her problem. I would recommend that you seek evaluation by a thoracic or vascular surgeon.