Uric acid testing is required for both blood and urine tests. This is because, in terms of laboratory tests, the determination of blood uric acid and the determination of uric acid are usually perfected. Blood uric acid measurement is mainly applied to some serum specimens and measured by uric acid enzyme method. There are large fluctuations in blood uric acid, so care should be taken to monitor it repeatedly. In addition, uric acid measurement requires a purine-restricted diet for 5 days and then testing. If the daily uric acid excretion exceeds 600 mg, it is considered excessive uric acid production. Gout is a metabolic disease, the underlying cause of which is a disorder of purine metabolism, resulting in a disease caused by an increase in blood uric acid. Therefore, patients with either hyperuricemia or gout need to have their uric acid levels monitored in a clinical setting.