Uric acid is the end product of purine metabolism, which is a trioxypurine with a weakly acidic alcoholic form. The uric acid generated by the oxidation of various purines is excreted in the urine. Under normal circumstances, there are about 1200mg of uric acid in the body, about 600mg of new production and 600mg of excretion per day, which is in a balanced state. However, if too much is produced in the body to excrete or the mechanism of uric acid excretion is degraded, too much uric acid will be retained, and when the blood uric acid concentration is greater than 7mg/dl, it causes the body fluids to become acidic and affects the normal function of the person, which will cause gout attacks, redness, swelling, heat and pain in the long term.