There are various causes of swollen feet, which are considered to be caused by venous obstruction in the lower limbs and renal insufficiency. A little bit of swollen feet may also be caused by the patient walking more, resulting in physiological swelling. Physical methods such as foot soaking, massage and hot compresses can be used to promote blood circulation in the feet, thus relieving the symptoms of leg swelling. 1. Lower extremity venous obstruction: blood flow is not smooth, venous blood reflux, blocked blood water extravasation, will cause swelling of the lower extremities. The lower extremities will appear swelling, pain and other manifestations. 2. Renal insufficiency: abnormal kidney function, can not exclude the body metabolic waste, and excess water, the patient’s body will appear foot edema, pleural effusion, abdominal fluid, etc. It is recommended that patients actively treat the primary diseases that cause renal insufficiency, such as hypertension, diabetes and so on. Patients should eat less salt, quit smoking and alcohol, moderate aerobic exercise, weight control. After excluding the physiological causes of a little swollen feet, you should consult a doctor in time.