What Would Cause my Breasts to Shrink?

As a teen I was a 32B, I was athletic back then with a very low % of body fat. I am now 30 and lost appx 30 lbs in the last year. I'm nearly back at my teenage weight and now an A cup. My body fat % today is quite a bit higher now, so this doesn't make any sense to me.

Doctor Answers 33

Breast changes with age

Unfortunately, what you are experiencing are the normal changes that occur in the breast with age.  When you are younger, your breast has more fibrous and dense tissue.  As you age, this becomes more fatty in consistency and you start to lose some of the structural support in the breast.  Also, where your body decides it will store fat also changes with age and may not necessarily go where we want it.  The same thing goes for facial aging, where we lose volume in our face as we get older despite being the same weight.

If you are desiring fuller breasts but not necessarily implants, then you may want to consider fat grafting where you borrow fat from one part of the body where you don't want it and add it the area where you want more volume.


Breast size will only change with your weight after they are fully developed. This must be your natural breast volume. You may do well considering augmentation

Norman Bakshandeh, MD, FACS
New York Plastic Surgeon
4.9 out of 5 stars 14 reviews

Do you know why breasts change size? Find out what might cause your breasts to grow or shrink.

Breasts may change size and shape for a variety of reasons throughout an average woman’s life. Some of these changes are hormonal (such as those experienced during pregnancy or menopause) while others are tied to lifestyle (weight gained or lost due to a changing diet or fitness regime) and even stress. Another cause we must consider is aging.

Volume loss is a factor for a lot of women, not just in the face but also the breasts. Youthful breasts include tissue that is more dense than older breasts, whose tissue may become more “fatty” and lose structure due to increasing laxity. In other words, as a woman ages, her breats may not be as perky or full, even when all other factors (weight, nutrition, exercise) remain constant.

If a shrinking cup size is an issue for you, the best way to combat it is to talk with an experienced board-certified plastic surgeon who can recommend the appropriate course of action for your unique situation

Colin White, MD
Vancouver Plastic Surgeon
5.0 out of 5 stars 1 review


Your breast size will change (typically decrease) as you age or lose weight.  There is an increase in the amount of fat cells and a decrease in breast tissue as you age.

Why are my breasts shrinking?

Thank you for your question.  A woman's breasts are not fully developed until they have been pregnant and breast-fed.  When you are younger, your breasts are more dense and have less fatty tissue.  As you get older, this relationship changes.  The breast become increasingly fatty and the size fluctuates more with your normal body weight.  Any type of weight gain will stretch the skin and subsequent weight-loss will leave you with a smaller cup size.  It sounds like what you have experienced are the normal physiologic changes associated with age, weight gain, and weight loss.  Breast augmentation can help restore the volume you have lost. Hope this helps. Good luck! 

John L. Clayton, MD, PhD, MPH
Salt Lake City Plastic Surgeon
5.0 out of 5 stars 7 reviews

Shrinking breasts

You are observing typical effects of aging on the appearance of your breasts. As you are developing, the breasts form with more fibrous and dense tissue. The breasts will become more fatty in consistency as you age and become less supported.

Kris M. Reddy, MD, FACS
West Palm Beach Plastic Surgeon
4.5 out of 5 stars 37 reviews

Breast size change with age

The breast is composed of gland and fatty tissue.  Weight changes would influence the fatty component and age/hormonal change would influence the glandular component.  Compared to your teenage years the natural shift in fatty tissue vs glandular tissue percentage is understandable and the change after 30lb weight loss expected.  I think at this point, you could consider augmentation mammoplasty if size increase is desired.

Michael A. Marschall, MD
Chicago Plastic Surgeon
4.0 out of 5 stars 9 reviews

Weightloss results in breast volume loss? The story checks out!

Hi 8353anon, You basically answered your own question here! You lost 30lbs in a year! I'm sure you lost weight all over and your breast are just one of the areas women can lose/gain fat volume. In addition to this change, your breasts (and entire body) are not the same as they were when you were a teenager. You are 30 years old, you can't possibly expect your body to be the same as it was during a growth phase of life. (And for you it sounds like a time when you were much more athletic and active than you are now.) Everything has changed. And you are going to continue to experience a lifetime of changes dues to hormones, stress, lifestyle and genetic pre-disposition. This is one of many. Congratulations on your lifestyle change to get healthier. You will benefit from years to come. If you want more breast volume, speak with a board certified plastic surgeon. Best of luck to you!

William Aiello, MD
Orange County Plastic Surgeon
4.9 out of 5 stars 36 reviews

Breast Volume Loss

It is not uncommon for breasts to shrink or get larger with changes in weight.  It is not necessarily related to Body fat % because that relates to the whole body, not just the breasts.  So what you are experiencing is normal.If your breasts have gotten smaller with weight loss, they will likely get larger with weight gain.  Your other alternative is a breast augmentation.

Barry M. Schwartz, MD
Weston Plastic Surgeon
4.0 out of 5 stars 4 reviews

Why are my breasts shrinking??

So sorry that you are dealing with this...  In general, women's breasts stay about the same with regards to both volume and shape - unless they gain/lose weight, or get pregnant.  Unfortunately, after the above life changes occur, one's breasts can certainly shrink/grow.  That being said, surgery can certainly assist in bringing you back closer to a former stage...  Best of luck!

These answers are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.