Swollen abdomen due to ascites on an 82 year old male patient. Ascites is a condition in which fluid collects in spaces in the abdomen. It is commonly caused by cirrhosis of the liver, which is typically caused by drinking too much alcohol. Other symptoms include weight gain, bloating and nausea. Treating ascites can involve steps such as limiting sodium intake, stopping alcohol consumption and taking diuretic medicines to reduce fluid in the body.