In most cases, early breast cancer does not cause pain. Due to the increased use of mammography, breast cancer, if found, is diagnosed early before symptoms appear.   Regardless, a woman should seek medical attention regarding any breast pain or other symptom that is persistent.

According to Susan G. Komen for the Cure, warning signs you should be aware of consist of the following:

  • A lump, hard knot or thickening inside the breast or underarm area
  • Swelling, warmth, redness or darkening of the breast
  • A change in the size or shape of the breast
  • Dimpling or pucker of the skin on the breast
  • Itchy, scaly sore rash on the nipple
  • Pulling in of your nipple or other parts of the breast
  • Nipple discharge that starts suddenly
  • New pain in one spot of the breast that does not go away