 [ Symptoms ] do i have the flu or a cold  i have a headache running nose sometimes with blood bad cough heat and cold flashes nauseous and a loss of appetite [ Disease ] hepatitis c is a liver disease caused by an infection with a virus it is a serious disease because the liver is needed to remove toxins that build up in the blood hepatitis c can cause cirrhosis and destroy the liver it is a main cause of liver transplants worldwide