You notice this when she is sick, run down and has a fever... What you described can cause all sorts of problems and when ANYONE is sick the type of hallucinations your child is having would not seem "out of the ordinary" with a fever. It would be out of the ordinary if she were having them every night, had a huge fear of her bed and began seeing things during the day or while awake. You may also want to look at some of the things that are causing her to become run down. How old is she? Does she have a poor immune system making her sick all the time? What can you do to help her stay healthier? Perhaps a differant approach may help... Good Luck!!!!