Treatment
Before you can start radiotherapy, your team needs to plan your treatment. This means working out the dose of radiotherapy you need and exactly where you need it
You might have external beam radiotherapy after breast surgery to lower the risk of the cancer coming back. Or you might have radiotherapy to shrink secondary breast cancer and help relieve your symptoms.
The side effects of external radiotherapy to the breast include tiredness and changes to the skin in the treatment area.
Last reviewed: 26 Jun 2026
Next review due: 26 Jun 2029