You may develop side effects over the course of your treatment. These usually disappear gradually over a few weeks or months after treatment finishes. Your doctor, nurse or radiographer will discuss this with you so you know what to expect. Let them know about any side effects you have during or after treatment. There are often things that can be done to help.
It's not unusual to feel worse before you start to feel better. Some people can find this a very difficult time and they may feel low or even depressed for a while. The clinical oncologist can advise you about what to expect.
External radiotherapy causes more side effects than internal radiotherapy. But many women have a combination of both treatments. If you are only having internal treatment, the most common side effects are to the bowel and bladder.