There is a brace you can get to be custom made for your chest. You tighten it and it slowly presses on the outwards area and flatness it out. The sooner the better, you have a good chance of getting it completely repaired at a young age because your bones are still growing and are easy to shape. I recommend going to a hospital and just asking them where you could obtain a this type of brace. Good luck :)
I'm a girl and I have the same thing! I went to the doctors they said that it will go away when I get a bigger chest. I don't now about boys though. There is no way to remove it because it is the way ur body is built... So yeah...
That should be fixed! My son has that we are getting it fixed with surgery.
I am 15 years old and i have the same thing my rigjt side is bigger than my left and i have been workimg out for a while now i have abs and pecs but it hasent madw a diffrence it just looks stronger . It dosent bother me but at the same time it does d: and ive tried evening it out but like i dont know how i like do push up but lean down on my left side more but ihavent been doing for a long time so ill see if it changes oh and dont worry girls dont relly care i been with this girl for a year 6 months and it never changed the way the she felt about me and man i have a chipped tooth lol but i know i know you just dont want it there you want a normal chest but just try work out see if it makes a difference it and be tuff about it. Dont let people bring you down just be like i was born like that so what lol idk just be tuff trust me but i fell you my frined called me a mutant man a mutant and i was like is my chest really that weird but then i was like nah yoir dumb my right side is just bigger so what and im lretty big ihave like big biceps you know what just work out like really work out if you really wany it gone as much as me work get bigger stronger even if it doesent change thats you but look atYOU now your chest might be wird but its strong and big girl dont care there just gonna be like ohhh there gonna gonna just be amazwd on how strong you are trust from a brother with weird chest to another We are all the same just remeber your not alone we all feel tge same way we can make a difference if we try