Clinically, there are many reasons for dorsal swelling, such as lower extremity venous thrombosis, cardiac insufficiency, liver and kidney disease, gout and trauma, and other disease precursors. 1. The dorsal swelling of the feet should be differentiated from unilateral or bilateral swelling. If the swelling is unilateral, it is necessary to consider the dorsal swelling caused by venous thrombosis of the lower limbs and lymphatic reflux disorder of the lower limbs. 2. If there is bilateral dorsal swelling, systemic diseases, such as heart disease (heart failure), kidney disease, liver disease, etc., should be considered. In addition to dorsal swelling, swelling of both lower limbs will gradually appear, and may be accompanied by chest tightness, shortness of breath, proteinuria and other related clinical manifestations. 3. If the swelling of the instep is accompanied by pain, gout, local trauma, mosquito bites and other conditions should be considered. If the dorsum of the foot is swollen, it is still recommended to consult a doctor in time to get standardized diagnosis and treatment.