Breast changes

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A breast change is any change in the breast from what is usual for a particular woman. Many women experience a variation in breast size or tenderness during their menstrual cycle, usually caused by changes in the levels of the hormones estrogen and progesterone.

Breast changes are common before menopause and during pregnancy and include:

  • Breast pain.
  • Breast lumps.
  • Nipple changes and discharge.
  • Changes in the skin, shape, or size of a breast.
  • Signs of a breast infection, such as redness, swelling, and tenderness.

The Health Encyclopedia contains general health information. Not all treatments or services described are covered benefits for Kaiser Permanente members or offered as services by Kaiser Permanente. For a list of covered benefits, please refer to your Evidence of Coverage or Summary Plan Description. For recommended treatments, please consult with your health care provider.