Purine-rich seafood includes anchovies, sardines, mussels, scallops, trout and tuna. Alcoholic beverages, especially beer, and drinks sweetened with fruit sugar (fructose) promote higher levels of uric acid. Normally, uric acid dissolves in your blood and passes through your kidneys into your urine.

High uric acid level: A high uric acid level, or hyperuricemia, is an excess of uric acid in your blood. Uric acid is produced during the breakdown of purines, which are found in certain foods and are also formed by your body.

What are the symptoms of uric acid stones? Uric acid stones have similar symptoms to other types of kidney stones. The main symptom is pain, which results from irritation or blockages inside the kidneys or urinary tract.