A breast lump is a growth of tissue that develops within your breast. It may be described as a mass, growth, swelling, thickness or fullness.

A breast lump can vary in the way it looks and feels. If you have a breast lump, you may notice:

  • A distinct lump with definite borders
  • A thickened, slightly more prominent area in your breast that's different from surrounding breast tissue
  • Other breast changes, such as redness, dimpling or pitting of the skin
  • One breast that's noticeably larger than the other (breast asymmetry)
  • Nipple changes, such as a nipple that's pulled inward (nipple inversion) or spontaneous fluid discharge from your nipple
  • Breast pain or tenderness

Sometimes, a breast lump is a sign of breast cancer. That's why you should seek prompt medical evaluation. Fortunately, however, most breast lumps result from noncancerous (benign) conditions.

Oct. 30, 2012