Higher alanine aminotransferase is not normal, it may be physiological elevation caused by strenuous exercise, late night, etc., or pathological elevation caused by liver disease, gallbladder disease, heart disease, etc., and systematic examination is needed to clarify the cause of the disease. The normal range of GATL is 0-40 U/L, which is found in liver cells. If you do strenuous exercise, stay up late for a long time, etc., it may lead to mild damage to liver function, and the alanine aminotransferase enters into the blood serum, and then a blood test may show a physiological high aminotransferase. Liver diseases, such as viral hepatitis, cirrhosis, toxic hepatitis, etc. can cause high alanine aminotransferase. Gallbladder diseases, such as cholecystitis, gallstones acute attack can lead to high ALT, accompanied by abdominal pain, nausea, jaundice and other symptoms. Heart diseases, such as myocardial infarction and myocarditis, lead to high ALT with symptoms such as shortness of breath and swelling. It is recommended to consult a doctor to identify the cause of high AAT and follow the doctor’s instructions.