Man Boobs

Patient: Im 16, 170 pounds, 5 feet 8″ and i cant get rid of man boobs. ive tried diet and exercise and i just cant get rid of them, my doctor said im just fat, but i dont look that fat. my stomach is flater but i still have man boobs. i used to weigh 212. please how do i get rid of them, and also if this helps, when i press on my nipple and move my finger around, i feel alot of small bumps, i herd this means its Gyno. please help. they are pretty big and their pointy, with puffy nipples