Radiotherapy can cause some general side effects. These usually disappear gradually over a few weeks or months after treatment finishes.
How you are affected will depend on the dose of radiotherapy, the length of your treatment and the size of the area being treated. Side effects can be more severe if you have radiotherapy combined with chemotherapy.
Side effects usually begin to develop after two weeks of radiotherapy. They may continue to get worse for 7 to 10 days after treatment ends before starting to gradually improve. Most people find that their side effects improve about 4 to 8 weeks after radiotherapy finishes, or when combined treatments end.
Before you start your treatment, your doctor, nurse, speech and language therapist, dietitian or radiographer will discuss your treatment with you so you know what to expect. Let them know about any side effects you have during or after treatment, as there are often things that can be done to help.