Transaminases generally refer to aspartate aminotransferase and alanine aminotransferase in liver function tests, and 90 U/L is beyond the normal range of both. Transaminases are enzymes that catalyze the transfer of amino acids to keto acids, and are found mainly in the liver, and are released into the bloodstream when liver cells are damaged by injury, such as ischemia, necrosis, or toxicity. Under normal circumstances, the two aminotransferases in the human body generally do not exceed 40 U/L, and the standard varies slightly from laboratory to laboratory. Test results exceeding the upper limit of the normal value of 2 to 3 times has greater clinical significance, suggesting drug damage, hepatitis, alcoholism, cirrhosis and other possibilities, but need to go to the hospital, further examination to clarify.