Breathlessness can be caused by cancer or its treatment. Other medical conditions can also cause breathlessness.
Find out how surgery, chemotherapy or radiotherapy might affect your breathing.
Read about how cancer and treatment can affect your heart, and how it might cause breathlessness.
Read about how cancer can cause fluid to collect around the lungs and build up in the abdomen.
Find out how a blood vessel blockage in the neck can cause breathlessness.
Information on other causes of breathlessness, including anaemia and chest infections.