Bach Original Flower Remedies Aspen is the remedy for any fear where the cause of the fear cannot be named. At one end of the spectrum the Aspen fear can be no more than a sense of foreboding, an uneasy anxiety that something unpleasant or frightening is going to happen. At the other it can be a real terror, with physical symptoms such as the hair standing on end. At this extreme Rock Rose could also be helpful.