How to Fix Uneven Teenage Breasts

Depends on the degree of uneveness and what you want ultimately.  In general, breasts fall into 'sisters not twins' for symmetry.  Having said that, there is more than that going on here so either augmentation of one side with lift of the other, or reduction of the large side to match the smaller one.  Depending on how large you wish to be, you may wish augmentation of both sides, with lift of the larger side to try to even out size of areola and shape of breasts.  Talk to board certified plastic surgeons to get a full assessment and understand that as you get older you may require more work depending on your body changes.  I have done many of these types of cases, and it is always thrilling to see how happy patients are to get their new look and confidence!

Help is on the way.  Consult with a Board Certified Plastic Surgeon in your area to get an honest evaluation of your condition and the options available to improve your appearance,  Without seeing any photos it is hard to be very specific about what can be done.  It sounds that you would benefit from a Bilateral Augmentation Mammaplasty and maybe a lift at least on one side.  If you have Tubular breasts there may be other work needed.  I am confident improvements can be made to meet your satisfaction.  Best of Luck.