Radiotherapy uses high-energy x-rays to destroy cancer cells, while doing as little harm as possible to normal cells. It is usually given as a series of short, daily treatments in the radiotherapy department, using equipment similar to a large x-ray machine.
Radiotherapy is sometimes used to treat recurrent melanomas that cannot be removed with surgery or are not suitable for other treatments. It may help to shrink large recurrences that are causing discomfort or pain. Your specialist will tell you if radiotherapy is suitable for you.
External radiotherapy does not make you radioactive. It is perfectly safe for you to be with other people, including children, after your treatment.