To see your son in your dream signifies your ideal, hopes, potential, and the youthful part of yourself. On the other hand, to see your son in your dream may not have any significance and may be simply mirroring your waking relationship with him. The dream may also be a pun on “sun”.
If you do not have a son and dream that you are searching for him represents the undeveloped masculine aspect of your own self. You need to acknowledge the youth and child in you.