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Why Do I Have Armpit Fat When I Wear a Bra?

Published in Bra Fitting 2 mins read

You might have armpit fat when wearing a bra because your bra may not fit properly. Specifically, a bra that is too small can cause this.

Here's a more detailed explanation:

How Bra Fit Affects Armpit Fat Appearance

When your bra is too small, it can create the appearance of armpit fat (sometimes called "boob fat" or "bra bulge") due to the following:

  • Squeezing of Tissue: A bra that's too small, particularly in the cups and band, can compress the breast tissue and surrounding skin.
  • Displacement: This compression forces the skin and tissue out of the bra cups and over the sides, leading to the appearance of bulges near your armpits. As stated in the provided reference, "When you're in a bra that's too small, it can squeeze extra skin and tissue out of the cups and band, giving the appearance of back fat and armpit fat."

How to Improve Bra Fit and Reduce Armpit Fat Appearance

Here are some tips to improve your bra fit and minimize the appearance of armpit fat:

  1. Get Professionally Fitted: Visit a lingerie store or department store for a professional bra fitting. A trained fitter can accurately determine your correct bra size.
  2. Check the Band Size: The band should fit snugly around your ribcage without being too tight. You should be able to slide two fingers underneath the band.
  3. Examine the Cup Size: Your breasts should be fully contained within the cups without any spillage or gaping.
  4. Try Different Styles: Balconette or full-coverage bras can sometimes offer better support and containment, reducing the likelihood of armpit fat.
  5. Consider Bra Alternatives: For some clothing styles, bra alternatives like supportive tank tops or shapewear may reduce spillage and improve the visible appearance of this tissue.

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