There are a number of tests you might have to find out if the symptoms you have are because your cancer has come back.
A CT scan is a test that uses x-rays and a computer to create detailed pictures of the inside of your body.
You may have a bone scan to show if the breast cancer has spread to the bone.
Ultrasound scans use high frequency sound waves to create a picture of a part of the body.
X-rays use high energy rays to take pictures of the inside of your body. They can show if the cancer has spread to other parts of the body.
MRI scans can show where the breast cancer has spread within the body.
PET-CT is one of the tests you might have to find out more about your cancer and whether it has spread.
You might have blood tests for secondary breast cancer to look at a range of things, for example, to look at how well your kidneys and liver are working.