Separation anxiety is very common for children at that age. When parents and children work together to help a child this age cope with the feelings of loss and anxiety upon separation, this provides the child with experiences that he or she can refer to in future separation situations. So even though your child may be having difficulty now with separation, this in no way predisposes the child to later anxiety issues. If the symptoms of the separation anxiety are so severe that they prevent your child from functioning more days than not in the classroom, for example, then I would recommend seeking professional help so that you and your child feel better equipped to handle the separation anxiety. What this means is that the way a parent disciplines a child, for example, or the way siblings fight or threaten each other may, in fact, have a long-lasting effect on a child who already has an anxious temperament.
Every child has a unique personality and a different threshold for various situations.
So it is important to step back and look at family interactions to see if certain patterns arise. They may help you understand why a child might be behaving in an anxious fashion. Whenever my daughter and her friends listen to hard rock for a long time, their mood changes to kind of a dark or sullen mood. Music certainly has a strong impact on our moods. There are both positive and negative effects.