Nonalcoholic fatty liver disease (NAFLD) and nonalcoholic steatohepatitis (NASH)

Nonalcoholic fatty liver disease (NAFLD) happens when your liver stores too much fat and it is not related to heavy alcohol use. Nonalcoholic steatohepatitis, or NASH, is a more severe form of nonalcoholic fatty liver disease that causes inflammation, called hepatitis, and liver cell damage.