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Breast lump

Updated: 2023-08-08


A growth in the breast that could look or feel different from the tissue around it.


If an infection called mastitis causes a breast lump that's painful while breastfeeding, it can help to change feeding positions. Extra fluids and rest also may help.

When to seek immediate medical care

See a health care professional right away if a breast lump grows or happens with:

  • Fever or chills.
  • Breast tenderness, swelling or warmth.
  • Pain or a burning feeling in the breast.

When to make a doctor's appointment

See a health care professional about any breast lump, especially if:

  • The lump feels firm or fixed.
  • It doesn't go away after 4 to 6 weeks.
  • It changes in size or starts to feel different.
  • An area of skin on the breast changes color, dimples or puckers.
  • A nipple turns inward or releases unusual or bloody fluid.
  • A lump in the armpit forms or seems to get bigger.