Uric acid 800μmol / L belongs to the uric acid obviously elevated situation, it is recommended to improve further examination for clarification. Uric acid is the end product of purine metabolism in the body, testing serum or plasma uric acid, the normal value for men is 208～428mol/L; the normal value for women is 155～357mol/L. Elevated uric acid may be related to gout, hemophilia, multiple myeloma, true erythrocytosis and so on. For those with uric acid above 800 μmol/L, it is usually associated with hyperuricemia. It is recommended that uric acid levels be rechecked on an alternate day. Adults with non-same day, twice fasting blood uric acid >420 µmol/L (micromoles per liter) in men and >360 µmol/L in women are clearly hyperuricemic. If the uric acid level is still high when measured again on the next day with a light diet, it is definitively caused by hyperuricemia. The patient is advised to take a light diet and actively cooperate with the doctor for treatment.