Ascites is a build up of fluid in the tummy (abdomen). The fluid causes the tummy to swell. This can be uncomfortable and cause other problems, such as, loss of appetite, feeling sick and constipation.

Ascites can be a symptom of many types of cancer. But, any condition which causes irritation to the lining of the abdomen (peritoneum), or blocks the normal flow of fluid in the abdominal space, can lead to ascites. So, ascites can also affect people who don't have cancer.

The usual treatment for ascites caused by a cancer is to drain the fluid. This often quickly relieves the symptoms. If the fluid comes back it's usually possible to repeat this procedure.

Sometimes, a water tablet (diuretic) called spironolactone can help to slow down the build up of ascites.

Treatments to control the cancer such as chemotherapy, may also help to control ascites.