How common is a breast lump in breast cancer?

Breast cancer may cause a new lump or thickened area that feels different from surrounding tissue. It may be painless, but pain does not reliably classify a lump. Other changes can include a nipple turning inward, unusual discharge, skin dimpling, or a change in breast shape. These signs are not specific to cancer, and many breast lumps are benign. Only a healthcare professional can assess the finding and decide whether imaging or a tissue sample is appropriate.

Book an appointment for any new breast lump, even if it is small or does not hurt. Note when you first noticed it, whether it changes during your menstrual cycle, and any nipple or skin changes. At the appointment, the clinician may examine both breasts and nearby lymph nodes, then arrange ultrasound, mammography, or other testing according to your age, symptoms, and examination. Avoid delaying assessment while trying to judge the lump by touch alone.

Arrange prompt assessment for a persistent or growing lump, a firm fixed area, skin dimpling, nipple inversion, bloody discharge, or a swollen area in the armpit. Seek urgent medical help for severe illness, rapidly spreading redness, or a painful breast with fever. These symptoms need evaluation because urgency is guided by the change itself, not by assumptions about its cause.

Ask what features were found on examination, which imaging test is suitable, and whether a biopsy is recommended. It is reasonable to ask when results will be available, what changes should prompt an earlier review, and who will explain the next step if testing is inconclusive.