Crystal deposition diseases like gout result from the buildup of crystals in the joints and surrounding tissues. Gout is caused by elevated uric acid levels leading to monosodium urate monohydrate crystal deposition. It most commonly affects middle-aged men and post-menopausal women. Acute gout causes sudden, severe joint pain and swelling, while chronic gout results in recurrent attacks, joint stiffness, deformity, and tophi formation. Treatment involves lifestyle changes to reduce uric acid along with medications like NSAIDs for acute flares and allopurinol or colchicine for long-term management.