Cirrhosis refers to scarring of the liver. Scar tissue forms because of injury or long-term disease. It replaces healthy tissue.
Scar tissue cannot do what healthy liver tissue does make protein, help fight infections, clean the blood, help digest food, and store energy for when you need it. Scar tissue also blocks the normal flow of blood through the liver. Too much scar tissue means that your liver cannot work properly. To live, you need a liver that works.
Cirrhosis can be life-threatening, but it can also be controlled if treated early.