Radiotherapy uses high energy x-rays to kill cancer cells. Find out about planning radiotherapy for breast cancer, how you have treatment, and about the possible side effects.
The radiotherapy team plan your treatment by working out the exact dose of radiotherapy you need.
You might have external beam radiotherapy after breast surgery to lower the risk of the cancer coming back. Find out more
The side effects of external radiotherapy to the breast include tiredness and changes to the skin in the treatment area.
Internal radiotherapy to the breast is not standard treatment in the UK. You might have it as part of a clinical trial.