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I'm a Guy. Why Do I Have a Lump In My Breast?

I found a little lump in my left breast and I'm a guy! It only hurts a little when I press on it. What could this be?
Tyrone*

When a guy goes through puberty, all kinds of changes take place in his body. Some guys develop a small lump in one or both breasts, which can be tender. This is called gynecomastia, and it’s normal. In fact, about half of all boys develop it during puberty. It usually goes away as a guy finishes puberty.

Breast changes in teenage guys are part of puberty, and rarely are serious. Signs that could mean a problem include if the lump gets a lot bigger or becomes hard, or fluid comes out of the nipple. If that happens, see your doctor — though, again, breast changes in teen guys are almost never serious.

Even if you're not worried, it's always a good idea to talk to your doctor about your changing body. Your doctor is the best person to give you health advice. Plus, getting used to talking to your doctor now will help you get more out of your medical care as you grow up.

*Names have been changed to protect user privacy.

Reviewed by: Amy W. Anzilotti, MD
Date Reviewed: 04-11-2020

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