Nonalcoholic steatohepatitis (NASH) is liver inflammation and damage caused by a buildup of fat in the liver. NASH is similar to the kind of liver disease that is caused by long-term, heavy drinking, but NASH occurs in people who don’t abuse alcohol. NASH is most common in patients who are overweight or obese. Other risk factors include: diabetes and high cholesterol. Sign up to schedule a Free Fibroscan!