There are physiologic and pathologic causes of elevated glutamic aminotransferase. Pathologic causes such as hepatitis, myocardial infarction, myocarditis and so on. 1. Physiological causes: under normal circumstances, the normal value of AAT is not more than 40 U/L. Physiological causes such as fasting greasy food before AAT test, lack of sleep, emotional stress, etc. can lead to AAT elevation, but the magnitude of the elevation is generally not more than twice the normal high value. 2. Pathological causes: Pathological causes can be seen in liver damage, but also in myocardial infarction, myocarditis and so on. Liver damage is due to the destruction of liver cells, which is common in various types of hepatitis, fatty liver, alcoholic liver, cirrhosis, autoimmune hepatitis and so on. When you find that the level of glutamic transaminase is increased, it is recommended to go to the hospital in time to improve the relevant examination, to clarify the cause of the disease, and to actively treat it.