Uric acid is a metabolic disease caused by the increase of uric acid in the blood due to the disruption of the metabolism of a substance called purine in the human body. If there is a problem with any one of these pathways, uric acid will rise. Uric acid rises because it blocks the process of uric acid production in the blood and prevents its excretion. High uric acid can also cause other diseases. So what are the tests for this disease? 1.Blood uric acid Uric acid (UA) is the end product of purine metabolism in nucleic acid in the body. Uric acid in the blood is mostly filtered by the glomerulus, except for a small part that is destroyed by the liver. Uric acid is the end product of purine metabolism. Disorders of purine metabolism, abnormal energy metabolism and impaired excretion of uric acid by the kidneys can cause an increase (hyperuricemia) or decrease (hypouricemia) in plasma uric acid concentration. It is now believed that uric acid measurement is the best biochemical marker for the diagnosis of gout due to disorders of purine metabolism (gout). The main characteristic of gout is hyperuricemia, which results in gouty acute arthritis, gouty stone deposits, gouty stone chronic arthritis and joint deformities, uric acid kidney stones and other renal pathologies that are very dangerous to health. Uric acid measurement also helps in the early diagnosis of kidney lesions. 3.Serum uric acid Uric acid is one of the important components of non-protein nitrogen in plasma, and it can be significantly increased in blood when there is severe kidney damage. In the case of mild damage, the change is not significant. Therefore, blood uric acid measurement is a sensitive indicator for the diagnosis of severe kidney damage.