I would always urge any under 21 to see their GP before considering surgery. Whilst all surgeons in the UK have a strict code of conduct to follow, they are not and cannot be impartial where their surgery is concerned.
I am 32 and had my surgery six weeks ago. However, I did consult my GP and said that I would not seek surgery unless I had my GPs backing.
I think this is especially important for anyone under 21 because you may not have completed adolescence. There could be an underlying cause of your gynaecomastia. This means that after surgery, there is a risk it could return. How would you feel if after spending a large sum of money, not to mention the trauma of surgery, both physically and mentally your gynaecomastia returned?
Please speak with your GP first and ask for a full assessment with an endocrinologist.
I am a medical representative and sell hormonal products to treat testosterone related conditions. I know only too well how ignorant GPs are (in the main) about this subject. If your GP appears unsympathetic or reluctant to refer you to an endocrinologist (hormone specialist) please message me or hypo-is-here for further advice.
I know many of us are reluctant to speak with our GPs for a whole range of reasons - all of them valid! But this is your health we are talking about. The journey of ridding yourself of gynaecomastia is not something you can run into without being fully informed and aware. Just because someone has the title of Doctor or Surgeon or Consultant, does not mean they know best. They don't. There are far too many horror stories on this website to back this statement up from guys that did not do all the essential research first.
There are a range of guys on here, some with excellent experience and knowledge of the whole disease and therapy area and in my opinion, whilst they are not medical professionals, ARE better placed to advise.
Bloomin 'eck, I can rabble on sometimes