Breast ultrasound

An ultrasound uses sound-waves to build up a picture of the breast tissue. You will also have an ultrasound of the lymph nodes in the armpit.

What is a breast ultrasound?

An ultrasound uses sound waves to build up a picture of the breast tissue. It can show if a lump is solid (made of cells) or filled with fluid (a cyst). It can also show if a solid lump is regular or irregular in shape.

An ultrasound only takes a few minutes. It is painless. You will be asked to remove the clothes from the top half of your body. Then you lie down on a couch with your arm above your head. The person doing the scan puts gel onto your breasts or chest area. They move a small device over the area. A picture of the breast tissue shows up on a screen.

Related pages

Ultrasound of the lymph nodes

You will also have an ultrasound of the lymph nodes in the armpit. If any of the nodes feel swollen or look abnormal on the ultrasound, the doctor will take a biopsy of them.

Related pages

About our information

  • Reviewers

    This information has been written, revised and edited by Macmillan Cancer Support’s Cancer Information Development team. It has been reviewed by expert medical and health professionals and people living with cancer. It has been approved by Dr Rebecca Roylance, Consultant Medical Oncologist and Professor Mike Dixon, Professor of Surgery and Consultant Breast Surgeon.

    Our cancer information has been awarded the PIF TICK. Created by the Patient Information Forum, this quality mark shows we meet PIF’s 10 criteria for trustworthy health information.

The language we use

We want everyone affected by cancer to feel our information is written for them.

We want our information to be as clear as possible. To do this, we try to:

  • use plain English
  • explain medical words
  • use short sentences
  • use illustrations to explain text
  • structure the information clearly
  • make sure important points are clear.

We use gender-inclusive language and talk to our readers as ‘you’ so that everyone feels included. Where clinically necessary we use the terms ‘men’ and ‘women’ or ‘male’ and ‘female’. For example, we do so when talking about parts of the body or mentioning statistics or research about who is affected.

You can read more about how we produce our information here.

Date reviewed

Reviewed: 01 October 2023
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Next review: 01 October 2026
Trusted Information Creator - Patient Information Forum
Trusted Information Creator - Patient Information Forum

Our cancer information meets the PIF TICK quality mark.

This means it is easy to use, up-to-date and based on the latest evidence. Learn more about how we produce our information.