The difference between synovitis and gout mainly lies in the etiology, signs and auxiliary examination. 1. Etiology: the etiology of different types of gout varies, which may be related to enzyme and metabolic defects, uric acid excretion disorders, excessive synthesis of uric acid, etc. The causes of synovitis are mainly trauma, immune factors, metabolic abnormalities, infections, etc., of which gouty arthritis caused by abnormal metabolism of uric acid may also cause synovitis. 2. Physical signs: patients with synovitis often have positive floating patella test and thickened bursa can be touched when checking the joint activities, while gout patients without synovitis only have palpable joint pressure and pain when checking the joints, and the floating patella test is usually not positive and the bursa is not thickened. 3. Auxiliary examination: gout patients blood uric acid, uric acid test results are generally high, while non-gout caused by synovitis is not increased. The identification of synovitis and gout should be carried out by specialized physicians, and it is recommended that patients go to orthopedics, rheumatology and immunology departments of regular hospitals for further consultation.