Definition of sleep hygiene in US English - habits and practices that are conducive to sleeping well on a regular basis
A number of conditions can cause fluid in the abdomen, including liver disease, heart disease and cancer. This page is about ascites due to cancer. This is usually a sign that the cancer has spread and is advanced. Cancers that can cause ascites include. 1  Ovarian cancer. 2  Breast cancer. 3  Bowel cancer. 4  Stomach cancer.
In brief: Water. Free fluid is typically water. The lining of your abdominal contents are slippery (your bowel, the lining of your organs) and it's thus wet inside your abdomen. It's normal to have a little free fluid in one's pelvis, as that's where fluid tends to pool.