Blood uric acid 487μmol / L is more serious, often gouty arthritis, kidney disease, eye disease and other symptoms, should be treated in time. 1. Gouty arthritis: commonly found in young and middle-aged men, with a rapid onset of disease. The first attack often involves a single joint, and the number of joints involved gradually increases with repeated attacks. 2. Renal lesions: gouty nephropathy has an insidious onset, with the development of the disease, renal insufficiency can occur in the late stage; some patients have uric acid stones, when the stones cause obstruction, it can lead to hydronephrosis, and in severe cases, acute renal failure and other symptoms can occur. 3. Eye diseases: some patients can have gout stones in the subcutaneous tissue of eyelids. If blood uric acid > 420μmol / L diagnosed as hyperuricemia, should be promptly admitted to the hospital and follow the doctor’s instructions for treatment.