Fatty liver may cause bad breath. Fatty liver refers to the accumulation of fat in liver cells, causing degeneration and necrosis of liver cells, and the main lesion is in the liver, which also has abnormal liver function. The liver is the largest digestive and metabolic organ of the human body, with a variety of functions such as detoxification and hematopoiesis. When fatty liver is damaged because of liver cells, the metabolic and digestive functions of the liver are diminished, which is more likely to cause various bacterial infections in the mouth, and bad breath may occur. Once fatty liver is diagnosed, various triggers causing fatty liver should be eliminated through diet control and exercise, such as alcoholic fatty liver needs to stop drinking, fatty liver caused by diabetes needs to control blood sugar, and high blood lipid needs to apply lipid-lowering treatment. If liver function is obviously abnormal, liver-protective drugs, such as silymarin capsules, polyene-phosphatidylcholine and dicyclomine, can be used to promote liver cell recovery, which can improve various symptoms caused by fatty liver.