I'm male, 19 years old: I have puffy nipple, but when I take shower they shrink.

Without an evaluation or a photos I cannot say if you have gynecomastia or not.  You should schedule and appointment with a board certified plastic surgeon.

Hi, Thank you for your post. It is hard to tell without an examination but it sounds like it could be gynecomastia. Nipples can shrink when they are cold. I would recommend setting up an appointment with a board certified plastic surgeon to see what the best options would be for you. They will also be able to answer any questions that you have at this time.

Healthy male patients with excess breast tissue or unwanted breast development who have no underlying breast disease.Men who desire improved physical and aesthetic appearance should have realistic expectations based on their condition and the procedure performed. You should meet with a board certified plastic surgeon to be able to get a formal diagnosis and to be able to decide on a course of treatment if necessary.
#gynecomastia #malebreastreduction

Hello and thank you for your question. It is normal for the nipple to shrink when exposed to the cold. It is not possible to comment on gynaecomastia without examining you. Please consult an experienced cosmetic surgeon.