The aim of abdominal aortic aneurysm (AAA) screening is to find aneurysms (bulges in blood vessels) early and monitor or treat them. AAA screening doesn't look for other health conditions.

Treating an AAA early greatly reduces the chance of it rupturing and causing serious problems.

You'll receive a letter inviting you for screening. You do not need to make an appointment.

Contact your local AAA screening centre

If you have symptoms of coronavirus (COVID-19), or have been in contact with someone who does, call the number on your invitation to rearrange your appointment.

What's an AAA?

The aorta is the main artery that supplies blood to your body. It runs from your heart down through your chest and abdomen (tummy).

As you get older, the wall of the aorta in your abdomen can become weak and balloon out. This is called an abdominal aortic aneurysm or AAA.

If left untreated and undetected, aneurysms can cause serious problems and be life-threatening. As the wall of the aorta stretches, it becomes weaker and could rupture (burst) causing internal bleeding. Where internal bleeding occurs, 8 out of 10 cases result in death.

The AAA screening test can help to identify if you have an aneurysm and if this needs to be monitored or treated. If you've an aneurysm, you may feel completely healthy with no symptoms or pain.

Who's at risk?

Men are 6 times more likely to have this type of aneurysm than women.

Aneurysms can happen in all men. However, there's a higher chance if:

Who'll be screened?

In Scotland, all men aged 65 are invited to attend AAA screening.

If you’re over 65 and have never been for AAA screening, you can arrange an appointment by phoning your local AAA screening centre.

AAA screening for transgender and non-binary people

What does it involve?

To find out if you have an AAA, a health professional will take an ultrasound scan (sonogram) of your abdomen.

These scans are:

  • completely safe, reliable and painless
  • quick, usually lasting for around 10 minutes

There are no risks associated with this ultrasound screening test. It's the same technique that's used to examine the development of a baby during pregnancy.

More about taking the test

Your AAA screening appointment (https://www.youtube.com/watch?v=/5yliqM7GpvU)

Here's what you can expect at your AAA screening appointment.

Used with permission from The Royal Bournemouth and Christchurch Hospitals

An NHS Foundation Trust

Your screening invitation

When you get your invitation, read the information carefully and decide whether you want to take up the invitation.

If you're unsure, look for further information to help you decide or talk to a trusted local health professional.

If you decide to take up the invitation, contact your local screening centre as soon as possible if you:

  • want to have someone else with you during the scan
  • have a disability
  • need an interpreter or any other help

Choosing not to be screened

It’s your choice whether to be screened or not. However, your local screening centre will only send one invitation.

If you choose not to be screened but change your mind later, you can arrange an appointment by phoning your local AAA screening centre

Further information and other languages/formats

Public Health Scotland has produced leaflets explaining why AAA is offered. This leaflet is available in multiple languages and formats:

AAA screening information

If you're unsure about anything or have questions about abdominal aortic aneurysm (AAA) screening, phone the NHS inform helpline.

Taking the test

The easiest and most effective way to find out if you have an aneurysm is to have an ultrasound scan (sonogram) of your abdomen. An ultrasound scan is a procedure that uses high-frequency sound waves to create an image of the inside of your body.

You'll have the test at your nearest screening centre.


When you receive your appointment, please contact the staff at the screening centre if:

  • you've access issues that prevent you attending your appointment or may cause difficulty during your appointment
  • you require an interpreter during your appointment
  • you require any other help or want to have someone with you during the scan

Before the test

At the screening centre, a health professional will check your details and explain the test. You'll have a chance to ask questions.

There's no need to fast before your scan. But if you can, avoid having a heavy meal to help the person doing your test get a clearer image.

During the test

The person doing your test will:

  • ask you to lie down and lift up, or unbutton, your shirt
  • apply a cool jelly to your abdomen
  • move a small scanner over your skin
  • take measurements of your aorta from an image on a screen

Your appointment will usually take no more than 30 minutes with the test itself taking around 10 minutes.

More about ultrasound scans

Second test

Sometimes health professionals won't be able to see the aorta clearly. This is nothing to worry about. However, you’ll need to be tested again to get an accurate result.

The screening centre will arrange a new appointment for you. This could be on a different day and at another clinic.

Test results

After the scan:

  • the person who carried out the ultrasound will tell you your result straight away
  • you'll be sent a result letter in the post

If you have an aneurysm, your GP will be sent a copy of the result letter so they can discuss your results with you.

Normal result

Most men have a normal result, which means:

  • no aneurysm was found
  • you won't need any further investigations or treatment
  • you won't need to be screened again, as it’s very unlikely you'll develop an aneurysm that needs treatment

Small, medium or large aneurysm

If your result isn't normal, it'll show whether you have a small, medium or large aneurysm.

Small or medium aneurysms may not require treatment, but they'll be monitored.

Small or medium aneurysm

If your aorta's a little bigger than normal, you'll test positive for a small or medium aneurysm.

Most aneurysms grow very slowly, and many men with a small or medium aneurysm never need treatment. However, it's important to check the size of the aneurysm regularly to monitor any growth as you may need treatment if it grows into a large aneurysm.

To monitor growth, your local screening centre will invite you for an ultrasound scan every:

  • 12 months for a small aneurysm
  • 3 months for a medium aneurysm

A health professional will also tell you what you can do to stop your aneurysm getting larger.

Large aneurysm

A large aneurysm means your aorta is much bigger than normal. Only a very small number of men will have a large aneurysm.

Large aneurysms are uncommon but can be very serious. As the wall of the aorta stretches, it becomes weaker, and it could rupture (burst). If the aneurysm ruptures, this leads to life-threatening internal bleeding and, in 8 out of 10 cases, death.

Your local screening centre will refer you to a specialist consultant, who'll:

  • carry out more tests
  • provide more detailed information
  • discuss possible treatment with you, including surgery

You'll be seen within 2 weeks by a specialist.

Treating a large aneurysm

The operations available to treat large aneurysms also have risks. They can sometimes result in serious complications, leading to death. However, operations on large aneurysms found through screening have a much lower risk of death than if the aneurysm ruptures on its own.

The risks of rupture and surgery vary from person to person. If you have a large aneurysm and surgery is a treatment option, a surgeon will explain in detail the risks of:

  • leaving the aneurysm untreated
  • having the operation to treat the aneurysm

If surgery isn't possible, there may be no other appropriate treatments.

Urgent advice: Phone your GP immediately if:

  • you have been diagnosed with an aneurysm and have unusual or unexplained abdominal (tummy) or lower back pain

If your GP practice is closed, phone 111.

When you phone, tell the health professionals you have an aneurysm and have been referred for assessment.

Further information and other languages and formats

Public Health Scotland has produced leaflets explaining what happens next if the test finds a small, medium or large aneurysm. These leaflets are available in multiple languages and formats:

You have a large AAA
You have a medium AAA
You have a small AAA

Last updated:
17 August 2022