Feet numbness, swelling of the feet are mainly seen in the following aspects of the cause: First, for young female patients, if there is numbness of the feet, swelling, to ask the patient whether there is no previous thyroid disease, there is no long-term in a sedentary position, this time you can go to do a hyperthyroidism function test, some women exclude the thyroid disease, may be caused by idiopathic edema. The second is for middle-aged and elderly patients. Secondly, for middle-aged and elderly patients, who have hypertension and diabetes, and have numbness and swelling of the feet, they need to do ultrasound of the blood vessels of the lower limbs to find out if there is any vascular plaque formation. Third, for malnutrition long-term bedridden patients, foot numbness, swelling, to ask the patient whether there is poor eating, this time need to go to do a liver function test, to understand whether there is the possibility of hypoproteinemia. Fourth, numbness and swelling of the feet should ask the patient whether there are itchy feet, foot problems, if there is a very serious foot odor can also cause numbness and swelling of the feet.