The term uric acid is often used to refer to blood uric acid in the blood and can also be tested for uric acid in the urine. Blood uric acid is included in the kidney function test or can be tested separately. Uric acid is produced by the metabolism of purine substances in the body. If an increase in uric acid is found on physical examination, hyperuricemia should be considered, and further tests can be performed to determine the cause of the increase in uric acid. When uric acid in blood and urine is increased, it should be considered as hyperuricemia. When uric acid in blood is increased but uric acid in urine is not very high, it should be considered as uric acid excretion disorder. Dietary factors such as drinking alcohol, eating seafood, drinking broth, eating animal offal and other foods high in purines may also cause an increase in uric acid.