Breast cysts may be found in one or both breasts. Signs and symptoms of a breast cyst include:

  • A smooth, easily movable round or oval lump with distinct edges (which typically, though not always, indicates it's benign)
  • Nipple discharge that may be clear, yellow, straw colored or dark brown
  • Breast pain or tenderness in the area of the breast lump
  • Increase in breast lump size and breast tenderness just before your period
  • Decrease in breast lump size and resolution of other symptoms after your period

Having breast cysts doesn't increase your risk of breast cancer. But having cysts may make it more difficult to find new breast lumps or other changes that might need evaluation by your doctor. Be familiar with how your breasts normally feel so that you'll know when something changes.

When to see a doctor

Normal breast tissue often feels lumpy or nodular. But if you feel any new breast lumps that persist after a menstrual period, or if an existing breast lump grows or changes, see your doctor right away.

Oct. 08, 2015