The swelling of right foot surface is the precursor of gout, diabetic foot, lower limb thrombosis, etc. The following is the specific analysis: 1, gout, if the patient’s right foot surface swelling is accompanied by redness, swelling, heat and pain, at this time to check the elevated uric acid should be considered to be caused by gout, given to lower uric acid treatment. 2, diabetic foot, if the patient’s right foot surface swelling and accompanied by elevated blood sugar, and a long history of diabetes, blood sugar is not well controlled, at this time should be considered to be caused by diabetic foot. 3.Lower limb thrombosis, if the patient’s right foot surface swelling is accompanied by lower limb vascular ultrasound, lower limb vascular occlusion or narrowing can be found, lower limb thrombosis should be diagnosed, and then anti-thrombotic treatment should be given.