I'm 21 years old. I have been noticing my puffy nipples. For few years. But yet now I didn't go to any consulting about this. I'm not very fat. I'm 180 cm tall and 70 kg. But my nipples are not like other guys or my friends. Its little big and puffy. If I'm wearing a T-shirt and going out every one can see my nipples. But I'm not having man boobs. I really do not know what to do. Just because of this I'm really embarrassed to take clothes of while going to beach. And I have noticed that when ever I feel cold or when I'm taking a shower my nipples comes to a normal size like everyone. And after some time it goes back again.. Actually is it a symptom of something. Or How can I get rid of this and be like everyone else. Or can any medicine helps. Why its happening to me like this.