High uric acid in children is usually associated with physiological factors such as improper diet and use of drugs, as well as pathological factors such as primary hyperuricemia, renal diseases and hematologic disorders. 1. Physiological factors: children who recently consumed too much seafood, animal offal, soy products and other foods, or recently used diuretics and other drugs due to health reasons, may lead to the emergence of high uric acid. 2. Pathological factors: primary hyperuricemia is the most common cause of high uric acid in children. High uric acid in children can also be caused by kidney diseases such as nephritis, nephrotic syndrome or blood system diseases such as leukemia. High uric acid in children may also have other causes, it is recommended to go to the hospital in a timely manner to improve the examination, with the help of the doctor to clarify the cause of the disease and give targeted treatment or therapy.