Breast lumps can be caused by:

  1. Breast cancer
  2. Breast cysts (fluid-filled sacs in breast tissue that are usually benign)
  3. Fibroadenoma (a solid, benign mass most common in young women)
  4. Fibrocystic breasts (lumpy or rope-like breast tissue)
  5. Galactocele (a milk-filled cyst that's usually harmless)
  6. Injury or trauma to the breast
  7. Intraductal papilloma (a benign, wartlike growth in a milk duct)
  8. Lipoma (a slow-growing, doughy mass that's usually harmless)
  9. Mastitis (an infection in breast tissue that most commonly affects women who are breast-feeding)

Causes shown here are commonly associated with this symptom. Work with your doctor or other health care professional for an accurate diagnosis.

Nov. 26, 2020