Gross, stubborn armpit bulges of fat/tissue! Is it armpit fat or breast tissue? How can i get rid of this? (photo)

I have had great success with liposuction of this area for axillary and 'bra strap' fat.  However, some people, if they have a lot of lax skin or if the fat is an extention of the breast, may need direction removal by surgery.  I suggest a formal evaluation.  I wish you the best of luck, Dr. Emer.

Both conditions can be treated during other procedures. The volume looks more like breast tissue .Be encouraged. Dr.  Cardenas

The fullness in the axilla is actually an extension of the breast. If it is substantially glandular only direct excision work. If it is primarily fatty, liposuction might be a simpler solution.

The area that bothers you is called the Axillary Tail of Spence and may be fat, breast or a combination of both but either way can be excised either through liposuction if fat or direct excision if breast via a small incision in your arm pit Dr Corbin

If I can help by summarizing the responses I would say that liposuction only removes fat cells and cannot suck it breast or other tissues. The advantage of liposuction is a very small access incisional scar and it won't make the skin sag or change its characteristics (or tighten it either). Excess breast tissue is removed by direct excision which requires a more significant procedure and incisional scar. The problem with axillary bulges is knowing whether the bulge is fat only or breast tissue with fat. There is no simple test for it or way to tell what the result will be with liposuction alone (the same goes for the breast itself -- including male breasts). Since liposuction is relatively easy and can be done with local anesthesia to keep down the cost and minimize the recovery, it's reasonable to try liposuction alone. Any residual can then be considered for direct excision and known incisional scar including removal of excess skin if needed. I would agree that in my experience there is often at least some breast tissue in this area and liposuction alone doesn't clear the bulge completely. 

New surgeons always try to remove those bulges with liposuction, and it never works. They are breast tissue and the more experienced surgeons don't waste your time or money trying it. The only treatment is surgical removal and that leaves a scar so you have to decide what is preferable to you - the bulge or the scar.