Gout is a metabolic disease with purine metabolism disorder and uric acid excretion disorder. The methods of determining whether you have gout mainly include the clinical manifestations of the patient, blood uric acid measurement, imaging examination, joint cavity puncture and so on. 1. Clinical manifestations: the main manifestations are red, swollen, hot and painful joints and dysfunction, with the unilateral 1st metatarsophalangeal joint being the most common. 2. Blood uric acid level: blood uric acid measurement is a routine auxiliary examination, under normal purine dietary conditions, non-same day twice fasting blood uric acid level > 420μmol / L, can be diagnosed as hyperuricemia. A small number of patients with hyperuricemia will develop gout. 3. Imaging examination: joint ultrasonography can be seen in the joint cavity point-like strong echoes and strong echogenic masses with acoustic shadow, suggesting the existence of gout stone. x-ray suggests soft tissue swelling, repeated attacks can appear in the articular cartilage rim destruction, irregular joint surface, joint space narrowing and so on. Dual-energy CT shows urate crystals. 4. Joint cavity puncture: acute joint bursal fluid can be seen under the microscope double refractive needle-shaped sodium urate crystals, which has the value of diagnosis. The above clinical manifestations and examinations are common methods to diagnose gout, if you have the above discomfort, it is recommended to go to the hospital in time and follow the doctor’s instructions to standardize the diagnosis and treatment.