Uric acid, a byproduct of purines in food, can lead to hyperuricemia and conditions like gout. Excess uric acid causes pain, redness, and tenderness in joints. Uric acid, a byproduct of purines in food, can lead to hyperuricemia and conditions like gout. Excess uric acid causes pain, redness, and tenderness in joints. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle