Gout is caused by high levels of uric acid in the blood, which results in pain in the big toe and other joints. Uric acid is produced during normal metabolism but the body's mechanism for neutralizing it can become inefficient, allowing uric acid levels to rise above 7 mg/dl and form monosodium urate crystals in the joints. When gout attacks develop, the affected area appears red, swollen, and painful, with the pain usually lasting from one day to over two weeks. Lifestyle changes including diet modifications can help control gout attacks and prevent long-term damage if treatment is sought early.