High uric acid depends on the laboratory index of kidney function, which generally includes blood creatinine and blood uric acid, and the kidney function can be checked to see whether the patient has elevated blood uric acid. A normal person’s blood uric acid level is less than 420 μmol/L. If the blood uric acid level is higher than 420 μmol/L, it is called hyperuricemia. Patients with chronic hyperuricemia may experience episodes of joint swelling and pain, also known as gouty arthritis. Patients with chronically elevated blood uric acid also have a greatly increased risk of heart, brain, and blood vessel accidents. Patients with elevated blood uric acid may develop complications such as kidney stones and gouty nephropathy. For patients with elevated blood uric acid, a low purine diet and, if necessary, uric acid-lowering medication should be added to the treatment.