If he can be patient: his gynecomastia will very likely go away after he has completed all 5 Tanner Stages of puberty. "Man-boobs" or gynecomastia represent a transient increase in breast tissue that occurs to varying degrees in about 70% of normal boys during puberty. Being overweight probably made them look bigger than they actually were, because of the fatty tissue that accumulates in that area .
Answered 10/26/2014
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