Several things are known to cause nausea including, swelling in the abdomen and change in appetite. Nausea is among the first symptoms of liver cancer. What happens is, the cancer cells will affect your liver functioning. As a result, the liver will not remove the toxic substances from your metabolism.
These toxic substances will accumulate leading to nausea or making you feel sick. As this continues, you will start to vomit and lose appetite. In some cases, these cancerous cells will release a hormone that increases the levels of calcium in your blood, a condition known as Hypercalcemia. Due to this, you might experience digestive problems as well as nausea.