Low uric acid retest generally need to test the uric acid level, kidney function, liver function and so on. 1. Uric acid level: If the patient has already had a low uric acid level before, the retest should also check the uric acid level, compare the values before and after the two tests, and analyze the changes. If the uric acid level is still persistently low, it should be taken seriously and diagnosed according to its clinical manifestations. If the uric acid level returns to normal, it is considered that the previous low uric acid level is due to diet. 2. Renal function: Uric acid is a purine metabolite, which is mainly metabolized by the kidneys, so any abnormalities in renal function may cause changes in uric acid levels. Low uric acid may be due to renal tubular reabsorption dysfunction, in this case, we should treat the kidney related diseases, and then monitor the uric acid level changes. 3. Liver function: the liver is the main place of uric acid production, but also part of the uric acid will be excreted with the bile, so liver function impairment may be a decrease in the production of uric acid resulting in low uric acid. At this time, you can apply anti-hepatic function injury drugs, targeting the primary disease treatment. Specific retesting items should be analyzed according to the patient’s clinical manifestations and other laboratory test results, and the patient should consult the competent doctor to avoid delaying treatment.