High uric acid is a disorder of purine metabolism in the body. The pathological changes are excessive saturation of blood uric acid, precipitation of urate crystals, deposition in joints, surrounding soft tissues and some organs, and various clinical manifestations. Some patients have increased blood uric acid but no clinical symptoms, which is the asymptomatic stage. If gouty arthritis develops, the patient may experience pain and swelling in the first metatarsophalangeal joint, and the ankle and knee joints may also be involved, with the first episode resolving spontaneously. If gouty arthritis is not treated systematically, gouty stones can form over the years. Gouty stones can be as large as an egg or as large as a sesame seed and can be deposited in the joints, auricles, and forearm extensions, leading to joint and bone destruction and even disability. It can also cause gouty nephropathy, decreased kidney function, and even uremia. Gout stones occur in the subcutaneous tissues of the eyelids, mild congestion of the optic disc in the fundus, and retinal edema, which affects vision. The main symptom of high uric acid is inflammation of the joints, which can also cause kidney and heart lesions. High uric acid is closely associated with diabetes, cardiovascular disease and metabolic syndrome. If you have increased uric acid, you should change your rational diet and go to the hospital in time to avoid complication symptoms.