Normal values for liver stiffness range from 2.0 to 7.5 kPa. The liver is an important organ of the human body and is the largest gland in the body. It not only secretes bile, but also helps the metabolism of sugar, fat and protein substances in the human body, and also has the function of detoxification. The liver can be damaged by poor lifestyle habits such as smoking, poor dietary habits such as drinking alcohol, and a preference for greasy foods, so regular medical checkups are recommended. In addition to liver function tests, liver hardness should also be checked. When the hardness of the liver is higher than 7.5kPa, it often indicates fibrosis of the liver tissue. When the liver hardness is higher than 12.5kPa, it often indicates that cirrhosis has occurred. Cirrhosis is an irreversible disease that is serious and should be taken seriously. If abnormal liver hardness is found during the liver examination, the doctor should guide the next examination to clarify the cause of the disease and actively treat it to improve the prognosis.