Hey, im a male im almost 19, im 170 cm tall and 60 kg weight and im perfectly an ectomorph and I do street workout (calisthenics). My problem is that despite that I have a slightly low body fat percentage in my body I still have puffy nipples and I don't think it's gynecomastia cuz in the chest area there's only muscles, it's so embarrassing to walk around with those please help.