Medically reviewed by Marla Anderson, MD Cysts (fluid-filled tissue pockets), infections, and swollen lymph nodes commonly cause armpit lumps. Finding a lump in your armpit can be worrisome, ...

"So what I always say to people is, you are not specifically looking for a pea-sized lump, it is any change in your breast or chest that doesn't feel normal, anything that you can feel under the ...

Swollen, tender, or enlarged lymph nodes may be felt under one or both of your arms. Breast tissue extends to the armpit ... area around the lump is red and it increases in size you develop ...

Other important signs of breast cancer to look for are: A new lump or thickening in your breast or armpit A change in size, shape or feel of your breast ... motion all the way up to your collarbone ...

Other important signs of breast cancer to look for are: A new lump or thickening in your breast or armpit A change in size, shape or ... up to your collarbone and under each armpit.

Other important signs of breast cancer to look for are: A new lump or thickening in your breast or armpit A change in size, shape or feel of your breast ... motion all the way up to your collarbone ...