What is cancer?
Cancer happens when a group of cells in the body stop working properly - they can also stop healthy cells doing their job.
Some cancer cells grow into a lump or tumour. Leukaemia happens when some of the blood cells do not work properly.
The cancer cells can sometimes spread to different parts of the body and people can get very sick when this happens, so it’s important to let the doctors and nurses help you get better. If you want to read more about cancer, please click here.