Hi I am a 13 year old (I know very young to be going on forums), but aside from that I have a very serious question to ask. For a few days now I have been thinking that I too have gynecomastia. I am not overweight at all i am about 5'4 and 110 pounds, I am wondering if I am just going through puberty gynecomastia, and how long does it take for it to go away. I have been doing 80 pushups each day, and sit-ups, (Just for the Abs, ya know) I have seen some improvement, but my nipples are still pretty puffy. Please Help, Thank you!!!