Read about the symptoms, causes and treatment of diarrhoea when you have cancer.
About 1 out of every 10 people (10%) with cancer have diarrhoea due to the cancer or its treatment.
Diarrhoea can be a side effect of cancer treatment or the cancer itself. Having a combination of treatments can cause worse diarrhoea.
Doctors and nurses might ask you questions and do tests to assess how severe your diarrhoea is and whether it needs treatment.
You can lose a lot of fluid very quickly when you have diarrhoea. You can become dehydrated. Your doctor will assess your situation to find out the cause of your diarrhoea.
Find out about all the ways you can cope with diarrhoea caused by cancer or its treatment.