I have a ball behind my puffy nipples (for 5 years , now i am 17) but i am overweight, my brothers have the same problem, can it be gynecomastia?

Bllurred vision: I assume you are speaking of a congested eye. Ask your doctor about using an antihistamine to reduce irritation and swelling.

Maybe: Enlarged breast tissue in men is more common than you think. Since it has been 5 years and since gynecomastia often appears as a rubbery mass that starts underneath the nipple and spreads outwards, it sounds as if you might want to consult with a plastic surgeon to discuss your options. (https://www.cosmeticsurg.net/procedures/gynecomastia/)