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New breast lump (needs checking)

Also called: Breast lump, lump in breast, breast mass

A new lump in the breast or armpit should be checked by a healthcare professional. Most breast lumps are not cancer, but only testing can tell.

Most lumpsNot cancer
Common causesCysts, fibroadenomas, normal changes
NeedsAn exam and imaging

Overview

Cysts are fluid-filled and often tender. Fibroadenomas are smooth, rubbery, and move under the skin.

A hard, fixed lump, skin dimpling, or nipple changes need a prompt check. Men can get breast lumps too.

Symptoms

Common signs:

  • New lump in the breast or armpit

Less common

  • Breast pain
  • Nipple discharge
  • Skin dimpling

Look up a symptom: Breast lump · Breast pain or tenderness · Breast skin dimpling, an inward nipple, a scaly nipple, or bloody nipple discharge · Nipple discharge

When to get medical care

Call 911This isn't an emergency by itself. Call 911 for trouble breathing, chest pain, or fainting.
Get care todayA red, hot, swollen breast with fever.
See a doctor soonAny new lump, especially one that's hard, doesn't move, or lasts past your period.

Causes

Cysts, fibroadenomas, hormone changes, infection, and sometimes cancer.

Does it spread or run in families?

  • It isn't contagious. You can't catch it from someone else.
  • It can run in families. Tell your doctor if a parent, brother, or sister has it.

Who is more likely to get it

  • Older age
  • Family history

Possible complications

Diagnosis

A clinician examines the lump.

Questions you may be asked

  • When you found it
  • Changes with your period
  • Family history

The exam

A breast and armpit exam.

Tests

Tests, if needed:

  • Mammogram or ultrasound:
  • Biopsy: A small sample if needed.

Treatment

Get it checked rather than waiting.

Self-care

  • Note the size and where it is
  • Keep your appointment for imaging

Prevention

To find changes early:

  • Know how your breasts normally feel
  • Get screening mammograms as advised

Which doctor treats this

  • Start with your primary care provider (family doctor or internist).
  • They may send you to a gynecologist (OB-GYN) or a breast specialist.

Pregnancy and breastfeeding

  • If you're pregnant or planning to be, tell your prenatal provider about this condition.
  • Don't start or stop any medicine on your own. Some are safe in pregnancy and some need to be changed.
  • Ask before taking any pain reliever. The FDA advises avoiding ibuprofen and naproxen after 20 weeks unless your doctor says to.
  • Breastfeeding: Most medicines are fine, but ask. The NIH LactMed database lists what's known about each one.

Outlook

Most lumps are harmless; cancers found early are very treatable.

Getting ready for your visit

Bring a list of your symptoms and medicines.

Questions to ask

  • Do I need imaging or a biopsy?

Research studies

Research studies test new ways to find and treat health problems. Some are looking for volunteers. Talk with your doctor before joining one.

Search ClinicalTrials.gov for studies on New breast lump (needs checking)

Sources

Last updated 2026-11-12.