The vast majority of the time a woman discovers a lump in her breast, it’s not cancer. Many women have naturally lumpy breasts; when you run your hands gently along your breasts, they may feel gravelly; or like you have marbles or other “growths” under your skin. So long as that’s how they always feel, it’s fine. When one lump SUDDENLY stands out from the rest, and becomes dominant, then you need to pay attention.
If the lump you feel is soft and squishy, and you can move it around a bit, it’s probably a
cyst.
If the lump feels firm, and you can move it around a bit, it might be a
fibroadenoma, a benign (non-cancerous) lump.
If it feels firm, and you can’t easily move it around, it might be a cyst or fibroadenoma that’s deep inside your breast; or (least likely), it might be cancer.
Swelling in or around your breast, collarbone, or armpit. ... Swelling or lumps around your collarbone or armpits can be caused by
breast cancer that has spread to
lymph nodes in those areas. The swelling may occur even before you can feel a lump in your breast, so if you have this symptom, be sure to see a doctor.