Nonalcoholic steatohepatitis (NASH) is a type of liver disease that is characterized by fat accumulation in the liver, inflammation, and potential liver damage. It is a severe form of nonalcoholic fatty liver disease (NAFLD) and can lead to cirrhosis and liver cancer. The exact cause of NASH is unknown, however, it is believed to be associated with risk factors such as obesity, diabetes, and high cholesterol. NASH is caused by an accumulation of fat in the liver due to an unhealthy diet or lifestyle. When the fat accumulates, it causes an increase in inflammation, which can lead to tissue damage. This tissue damage can be seen on liver biopsy, which is used to diagnose NASH. Symptoms of NASH can include fatigue, abdominal pain, and jaundice. Treatment of NASH focuses on reducing the risk factors associated with the disease. This includes lifestyle modifications such as weight loss, increased physical activity, and a healthy diet. Medications such as insulin sensitizers, cholesterol-lowering agents, and antioxidants may also be prescribed. In severe cases of NASH, liver transplantation may be necessary. It is important to note that NASH is a serious condition and can lead to complications if left untreated. It is important to consult a physician to discuss the best treatment options for your particular case. With the right lifestyle changes, medications, and support, NASH can be managed and complications can be avoided.