What are the symptoms of Nonalcoholic Fatty Liver Disease (NAFLD) and Nonalcoholic Steatohepatitis (NASH)?

The symptoms of NAFLD and NASH are identical. They are very bland (not dramatic) and non-specific (can also be observed in other diseases). They can occur at any adult age and, in children, usually appear after 10 years of age. Actually, most patients have no symptoms. They may, however, experience occasional, vague right upper-quadrant abdominal pain (below the rib-cage on the right side). This pain characteristically is dull and aching, without a predictable pattern of occurrence. It is not an intense, sudden, and severe pain, as might occur with, for example, gallstones. The abdominal pain in NAFLD and NASH is thought to be due to the stretching of the liver covering (capsule) when the liver enlarges and/or when there is inflammation in the liver.