Dry mouth in early stage of hepatocellular carcinoma is considered to be caused by recent low water intake or combined with cirrhosis of liver. Dry mouth in early stage of liver cancer is mostly considered to be the result of low water intake or excessive water loss, such as dry mouth and thirst, etc. The majority of patients with early stage of liver cancer will not have abnormalities. Most of the patients with early stage of liver cancer do not have any abnormalities, and a few of them may only have slight digestive discomfort, abdominal distension, etc., which are generally not serious symptoms. Therefore, dry mouth in early stage of liver cancer should also be considered whether it is caused by insufficient daily water intake. In addition, if liver cancer is combined with severe cirrhosis in early stage, cirrhosis may lead to insufficient effective blood circulation in the body, thus resulting in dry mouth. Since dry mouth does not occur in the early stage of liver cancer itself, it is necessary to further investigate whether there are other related factors leading to dry mouth and provide timely treatment.