High lactate dehydrogenase mainly reflects the suffering from some diseases, and these diseases may cause certain harm to the body, such as lactate dehydrogenase is common in hepatitis B patients. Due to liver cell damage, taking drugs with big side effects on liver and kidney or cancer cell metastasis in tumor patients, these diseases will cause pernicious anemia, shock and other hazards, cerebral infarction, myocardial infarction and so on are also causes of high lactate dehydrogenase. Therefore, if lactate dehydrogenase is too high, patients need to clarify the cause of high lactate dehydrogenase according to their own medical history, medication, treatment, etc., and carry out further treatment according to the cause of the disease, so as to cure the primary disease in order to make lactate dehydrogenase return to normal.