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Symptom guide

Breast lumps

Find out about breast lumps. They can have a lot of different causes and most are harmless. But always see a GP if you have a lump in your breast or any unusual changes to your breasts.

About this information

This NHS content is written for people in England. Services, contact routes and treatment arrangements may differ in other countries.

See a GP if you notice:

  • a lump in your breast or armpit
  • any other unusual changes in your breasts – such as the nipple turning inwards, dimpled skin or bloodstained nipple discharge

Changes in the breasts can be a sign of breast cancer. This is easier to treat if it's found early.

What happens at your GP appointment

If you have a breast lump, a GP will look at and examine your breasts.

If they're not sure what's causing the lump, they'll refer you to a hospital or breast clinic for further tests.

These tests usually show that a lump is not cancer.

What happens at the breast clinic

At the hospital or breast clinic, you may have a:

These tests are often done during the same visit. You'll usually be told the results on the same day, although biopsy results take longer – you may have to wait about a week.

Treatment for a breast lump depends on the cause. Most are harmless and may go away on their own without treatment.

Causes of breast lumps

Lumps in the breasts can have lots of different causes.

They're often caused by something harmless like a non-cancerous tissue growth (fibroadenoma) or a build-up of fluid (breast cyst).

Sometimes, a breast lump can be a sign of something serious like breast cancer.

Do not try to self-diagnose the cause of your lump – always see a GP.

Breast lumps

Causes

Breast lumps

Diagnosis

Content supplied by the NHS website

Content supplied by the NHS website, refreshed 19 August 2026. View the original NHS article ↗

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