Sign #1: A New Lump or Thickening in the Breast or Underarm
The most commonly reported change is a new lump or mass in the breast or underarm area. According to the CDC and American Cancer Society, this often feels different from the surrounding tissue—perhaps harder, irregular in shape, or painless (though some can be tender).
It may appear suddenly or develop slowly.
Check both breasts and armpits during self-exams.
Not all lumps are cancerous—many are cysts or fibroadenomas—but any new one warrants a professional review.
But that’s not all… even without a distinct lump, pay attention to…
