Uric acid in the blood - Definition

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Generally, uric acid in the blood is low. When a high concentration is reported, it's called hyperuricemia. A high level of uric acid in the blood is responsible for gout, an acute illness producing pain in one or more joints (often the big toe) but if the level remains high for a long time (months or years), the illness becomes chronic and causes debilitating joint pain and a loss of kidney function. Kidney stones can also be the result of uric acid in the blood.