Lactate dehydrogenase 312 U/L is not normal. The normal human lactate dehydrogenase range is 120-250U/L, 312U/L is out of the normal range. However, one test result is not enough to prove the abnormality of the body, it is better to confirm the test again under the guidance of professional doctors. Since lactate dehydrogenase is widely distributed in the cell cytoplasm of the heart, kidneys, liver and other tissues and organs, if abnormal, it often indicates that the patient suffers from diseases of the relevant organs. However, elevated lactate dehydrogenase alone is not enough to prove that a patient is suffering from such a disease. Therefore, if the test results are abnormal, it is best to consult a doctor in a timely manner, complete the relevant examinations, combined with a comprehensive analysis of the recent physical condition in order to make an accurate judgment, it is recommended that the cause of the disease be clarified under the guidance of the doctor, and active treatment.