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BOD-ities: Why are my breasts different sizes?

Paoli Hospital November 9, 2017 BOD-ities By Mojdeh Saberin, MD

First, it’s important for you to know that this isn’t uncommon. Just like having feet that differ in size or arms that differ in length, your breasts can differ slightly in size, position or form. And, while you might feel a little self-conscious about it, chances are that nobody else has noticed.

There are several reasons why your breasts may be asymmetric. First, they may have developed at a different pace. During puberty, one breast may begin developing before the other or grow more quickly than the other. In most instances, your breast size will even out once you are out of your teen years. However, in some cases, one breast may still be slightly larger or smaller than the other.

Hormonal changes can also cause breast changes. During your period or pregnancy, for example, you may notice that your breasts change in size or develop additional lumps. This may also occur for women who are breastfeeding, take birth control pills or are going through menopause. These are temporary changes, and are typically not cause for concern.

Finally, traumatic injuries or health issues like scoliosis, bruising and hematomas can affect your breast landscape.

While all breasts will fluctuate in size during a woman’s lifetime, you should report recent changes to your breasts to your OB/GYN—particularly if you notice lumps that last more than a week, redness or nipple discharge.

If you feel self-conscious or uncomfortable, there are steps you can take to make your breasts appear more symmetric. A relatively inexpensive way is to visit a lingerie shop, where a specialist can offer recommendations to help disguise minor asymmetry.

If your breasts are more than one cup size different, however, you may want to pursue breast reduction or breast implants. If this is the case, make an appointment with your primary care physician or OB/GYN, who can recommend a specialist to discuss your options.

To schedule an appointment with a specialist at Main Line Health, call 1.866.CALL.MLH (1.866.225.5654) or use our secure online appointment request form.