Strictly speaking, there is no indicator for gout, but generally hyperuricemia plus joint symptoms is used to diagnose gout, that is, joint symptoms combined with hyperuricemia, and gout can be diagnosed based on blood sampling and ancillary test results. The international definition of uric acid level in gout patients is higher than 420μmol/L for men and 360μmol/L for women, which can be diagnosed as hyperuricemia. Uric acid above 420μmol/L has reached supersaturation, and uric acid is easily deposited in the tissues and causes gout. The diagnostic index of hyperuricemia is blood uric acid, and its reference value range varies depending on the monitoring method and the age of the tested population. Generally, the normal value for adult men is 149-417μmol/L, and the normal value for women is 89-357μmol/L.