My 5 year old daughter complains that her arm and legs hurt after she wakes up most mornings. should i be worried?

No: Complaints of pain are not normal. This should be evaluated. Pain is the body's signal that something is not right. Growing pains can occur during growth spurts in adolescence, but would be uncommon in a 5 year old. If she is really having pain with out history of over use or trauma then a work up for juvenile rheumatoid arthritis or other musculoskeletal problem is appropriate.