Up to 65% of young men will develop breasts by the age of 14. As boys go through puberty, they will have an imbalance of sex hormones. This is a normal condition but can be very frightening as they see their body going through changes
Unfortunately, if boys do not understand what is happening they will probably try to hide their chest with loose fitting shirts, avoid swimming, or any activities that require removing their shirt. Most boys are too embarrassed to confide in their parents.