High uric acid may be caused by poor renal function or due to other reasons. 1. Renal function damage: uric acid is mainly excreted to the outside of the body through glomerular filtration, if the glomerular filtration function is impaired, it can lead to reduced uric acid excretion and increased blood uric acid concentration. 2. Other causes: commonly found in secondary gout caused by massive cell destruction such as malignant tumors, and primary gout caused by hereditary enzyme deficiency. Long-term use of diuretics (furosemide), pyrazinamide and other patients can also appear elevated uric acid. Elevated blood uric acid concentrations can also be manifested in people who have been fasting for a long period of time. If you have elevated blood uric acid, you should go to a regular hospital in a timely manner to clarify the cause of the disease and carry out standardized treatment under the guidance of a doctor.