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What Cause Armpit Fat or Underarm Bulge


If you have that fat under your arms, how would you feel?  Would you be comfortable and confident at how you look, especially when you are in a tank top or a strapless/sleeveless dress?  I guess you wouldn’t be. This excess fat is commonly called armpit fat, or underarm bulge, underarm fat, armpit lump, armpit bulge, or armpit fat hang etc. But whatever you call it, it’s unsightly and definitely an eyesore.

There are many factors that cause armpit fat. It could be a genetic trait for some people. If you know your mother, aunt and grandmother all had this issue, then you should not be surprised that you have this problem also. If the upper body is not used very actively, such as working with your arms, or in strength training, you may possibly develop this armpit lump because the muscle tone to tighten up this area is very little.

The size of your breasts could matter too.  Do you have naturally large breasts? If yes, then the fat content in your chest is already high, and the chances of developing armpit fat is also high. Other contributory factors to underarm bulge include being overweight and hormonal imbalance and changes.

However, the most common cause of armpit fat is wearing a bra that does not properly fit.  When you wear a bra with cups being too small for your boobs, then your breast tissue could “escape” or “migrate” to the underarms region. This happens also if the band is not fitted right to your body. Overall, it is reported that 80% women do not wear a fitted bra. But even if you get your size right, it is still very usual that you have the armpit fat, as most bras on the market are not designed to prevent or cure this issue, if not worsen it. The following is an illustration of underarm fat rolls even the bra sizing is not the cause.

Armpit Fat | FinallyBra No Bulge Bra

Armpit Fat / Underarm Bulges

Women with armpit fat have different approaches to this problem.  Some try diet and exercise combo in the hope of losing the fat at their underarms. Others use topical creams containing licorice. But more studies must be done and more positive results are needed to prove its effectiveness. Some people try syringe liposuction or cosmetic surgery, which cost a fortune, and, painful. Additionally, if you are terribly overweight, only a few surgeons will agree to do it on you as the doctors don’t expect to see good results on this procedure.

To eliminate the appearance of armpit fat, the first and perhaps the easiest thing to do is to find the correct size, either by yourself or bra experts. Having the right size, you need to select the bra styles that offer strong side support and push in function which help to push and cover more breast tissue under the cups. If you try an underwire bra, see where the wire ends:  it should be on the rib cage, not on the breast tissue. The wire ending on the breast tissue means that the cups are too small.  If your skin still bulges even if the cup encircles your entire breasts, get a larger size of back band. FinallyBra is the only brand with designs to prevent and banish armpit fat in mind and see the picture below for the quick and stunning results.

Push In No Armpit Fat Bra | FinallyBra No Bulge Bra

FinallyBra for Armpit Fat / Underarm Bulges

How you wear a bra matters too. You need first fasten the band, then place your breasts inside the cup and slip the straps. After that, scoop the breast tissue that is under your arms and place them inside the cups, making sure that they are settled.  Adjust the straps to a two-finger tension.  See here for a detailed guidance of how to wear a bra right.

Bra is actually one of the most important pieces for women because it makes you look pretty when wearing it right and magnifies your imperfection when you get it wrong. Get a right bra and wear it right, it is all that simple!

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Comments 20
  • Marion Tabitha
    Marion Tabitha

    I developed this this thing when I was around 16years….the fat keeps growing the more I grow and it irritates I can’t even put on a short sleeve is there anything I can do to do away with it cause most of the physicians ain’t helping… and btw I’m slim so the armpit fat appears very bad. I tried everything buh nope still ain’t helping

  • Marcia Badal
    Marcia Badal

    Im having armpit fat and i really needto loose it asap.

  • Lola

    I’m a young teenager, who is not overweight, just normal size for a teen girl. Though I have a lot of armpit fat, even when i have no bra on. This makes me feel uncomfortable and insecure around people, please tell me what this is..thank you

  • Sharon Sims
    Sharon Sims

    I have armpit fat under both arms. Is there anything I can get rid of it with local anesthesia?

  • SaamG

    I am experiencing the same problem but under one arm, look like ah lump… isn’t hard… Doctors say it’s just fat… how can I get rid of it???

  • SG

    Rola… I have the same problem been to the same amount of doctors n that all say it’s fat, it looks like ah lump but it’s not hard… how can I get rid of it???

  • Rola

    I recently noticed something under one of my armpits. I was initially scared and thought it was a swollen lymph node then was told by 3 physicians that it was fat. It looks more like a lump but it’s soft and you can’t feel anything that’s why I really do think it’s just fat. Has anyone ever had this happen to them?

  • Evelyn

    Please, apart from changing my bras, is there no drugs to get rid of this armpit bugs. It’s making me lose confidence in myself. Please help me out. Thanks

  • 40C

    What about fat that is behind the arms? I have one side that is more of a problem there than the other. Any recommendations?

  • Pratiksha

    I’m not fat but I have large breast since 2 year and I aslo got armpit fat .. and it looks terrible when I’m wearing sando 😒

  • Kim Moore
    Kim Moore

    Just recently explanted and now my breast are droopy and lots of side fat. I am having problems with cups sizes being to big . I have no breast tissue up top are they something you could recommend?

  • Marcia S Samuels
    Marcia S Samuels

    My armpit fat is way fatter than the pictures you show I wear a 36 b bra I try different sizes nothing help, am miserable.

  • Akanksha Pandey
    Akanksha Pandey

    I don’t understand why my breast size is still increase even my weight is constant and this was happen specially when I get the perfect bra size can u plaza told what can I do to lift my breast because it is to loose and hanged so I don’t get perfect bra and the second how I stop the growth of my breast even I m 21 years old

  • Elise

    Hi I think I’ve been wearing a bra that was too small me and has caused me to have armpit bulge , how can I relocate that fat or is that not possible ? X thanks :)

  • Sofia

    Hi Martha,
    Armpit fat happens to women of all ages and sizes and you are not alone there. Please make sure that you find the right size of bras first. If you are still not clear yet, please see “How to measure your bra size” here:
    Please make sure that you pick bras that targeting “no side effect”, which means that the bras have special functions at banishing the armpit fat. Additionally, the bra should have side support, which means it can help to relocate the fat back to cups. Orlinas bras are special armpit fat bras, so it is probably worthy of trying.
    Hope this helps and thank you.

  • sofia

    Hi Celine, yes scooping definitely helps. Actually we encourage you scooping as much as possible. On top of that, please wear bras that have strong side support and side coverage like Orlinas Shape bra, which will make sure that the armpit fat can be relocated to the right place (under cups).
    We thank you for your comment here

  • CEline

    Hi will scooping be effective if I raise my hands after scooping?

  • Martha

    I am for the most part pretty thin and medium size breasted. My arm pit fat is very noticeable and is driving me crazy. Usually when measured they tel me I am a b or c cup with 38" rib measurement. Please help it is a big problem for me

  • Nnaemeka Chinwendu
    Nnaemeka Chinwendu

    I think I got this information late because am a victim of under armpit fat,mine is now so glaring that it bulges when I wear a body fitted top or shirt and I fill so uncomfortable. I really need help.thanks

  • Sammy

    So if i change my bra to a bigger one will i lose my armpit fat???

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