Lump under left nipple

I am a 19 year old male and about 4 years ago I noticed a lump underneath my left nipple thats is extremely noticable. I still have it today and it hasnt changed a bit. I feel no pain but when  I feel it there is a little pain. It moves around pretty easy. I have asked my doctor about it everytime I go to visit him but he keeps on telling me it will disappear over time. I dont see it going away anytime soon and i know it is most likely not cancerous. So is there someone else I should go see to get a second opinion?

[japdip]

If it hasn't gone away in 4 years I doubt that it will now. You might consider seeing a Surgeon about having it removed if it's bothering you that much. That way you would know exactly what it is and it would be "gone".     Good Luck ...