High lactate dehydrogenase suggests that the body may have skeletal muscle damage, liver disease, pulmonary infarction, myocardial infarction and rhabdomyolysis. Lactate dehydrogenase is also a kind of glycolytic enzyme, and its normal reference value in serum is 135~215 U/L. Blood diseases, heart diseases, liver diseases, malignant tumors, skeletal muscle injuries, anemia, shock, and pulmonary infarction can cause high lactate dehydrogenase. When a patient’s test report shows high lactate dehydrogenase, the patient should go to the hospital to have a relevant examination under the guidance of a doctor to clarify the cause of his/her high lactate dehydrogenase. According to the patient’s own condition and test results, determine the relevant treatment program, and carry out symptomatic treatment.