Gout, a painful form of arthritis, occurs when high levels of uric acid in the blood cause crystals to form and accumulate around a joint. Uric acid is produced when the body breaks down a chemical called purine. Purine occurs naturally in your body, but it's also found in certain foods. Uric acid is eliminated from the body in urine. Gout occurs when urate crystals accumulate in your joint, causing the inflammation and intense pain of a gout attack. Urate crystals can form when you have high levels of uric acid in your blood. Your body produces uric acid when it breaks down purines — substances that are found naturally in your body. Purines are also found in certain foods, such as steak, organ meats, and seafood. Other foods also promote higher levels of uric acid, such as alcoholic beverages, especially beer, and drinks sweetened with fruit sugar (fructose).