I have a 15 yr old son that has gynecomastia is there a natural way of dealing with this?

Was this officially diagnosed by a doctor? Many teen boys go through a stage of breast enlargement during puberty without it officially being gynecomastia.

Treatment of the condition largely depends upon it's cause.

Gynecomastia (enlarged breasts in men) Treatments and drugs - Diseases and Conditions - Mayo Clinic