The laboratory diagnostic criteria of gout are as follows: i. The determination of blood uric acid, blood uric acid value more than 7mg/dl for men and more than 6mg/dl for women, that is, hyperuricemia. Second, the determination of uric acid in urine, after 5 days of low purine diet, the uric acid excretion inside the 24h urine is more than 600mg, which is the type of excessive uric acid production, accounting for about 10%, and less than 300mg suggests the type of reduced uric acid excretion accounting for about 90%. Under normal diet, uric acid excretion in the 24h urine is differentiated by 800mg, and exceeding these levels is considered as increased uric acid production. This test is more important for patients with a family history of gout at a younger age, with significantly elevated blood uric acid levels and with kidney stones. Third, urate testing can be performed to diagnose patients with normal uric acid levels in the blood. During acute attacks, urate can be seen in the synovial fluid of the joints in addition to white blood cells, and also in the extracts of gout, and during the inter-episode period, urate can be seen in the synovial fluid of the joints that have been involved. The above is for reference only. Please refer to your doctor’s instructions for specific medication and treatment.