The liver is an abdominal organ that is found in the upper right part of the stomach, extending from the right quaternary region to the middle of the epigastrium, with a small portion located in the left quaternary region. The liver is the largest glandular organ in the body and plays an important role in material and energy metabolism. The liver has important functions such as the production of clotting factors, secretion of bile and detoxification, thus playing a role in maintaining the body’s equilibrium, removing toxic substances from the body and participating in blood clotting. If the liver is attacked by various pathogens, it will cause liver damage. For example, hepatitis virus can cause viral hepatitis, hepatitis B virus infection can cause chronic hepatitis B and other diseases. If the disease is not treated, the condition can keep progressing and even cirrhosis or liver cancer can occur. If patients have liver discomfort, it is recommended to go to the hospital in time for examination and treatment according to the cause of the disease.