Most of the diagnostic criteria for gout currently use the gout diagnostic criteria developed by the American Rheumatism Association in 1997, which includes the following 9 items. 1.Acute arthritis with more than 1 attack, which reaches its peak within 1 day. 2.Acute arthritis is confined to individual joints. 3.The whole joint is dark red. 4.The first toe bone joint is swollen and painful. 5.Acute attack of unilateral metatarsal osteoarthritis. 6.Gout stone. 7.Hyperuricemia. 8.Asymmetric arthritic swelling and pain. 9.The attack can be stopped by itself. A clear diagnosis is made when three or more of the above criteria are present, with the exception of secondary gout. For example, if the first metatarsal joint is found to be swollen and painful, the local skin color is dark red, and the blood uric acid is higher than normal, then according to this criterion, a patient with gout can be diagnosed.