In general, edema is more common on both sides, whether it is chronic kidney disease, heart failure, edema caused by idiopathic edema, and women’s idiopathic edema caused by endocrine reasons are all characterized by bilateral edema. If only unilateral leg swelling, unilateral foot swelling is often the cause of vascular, often venous diseases, such as phlebitis, especially saphenous phlebitis, vascular venous valve problems, that is, venous reflux obstacles, often appear unilateral leg swelling, unilateral foot swelling. There are also cases of high uric acid is gout, gout disease can also be manifested as swollen feet, but often accompanied by redness, heat and pain, not only swelling but also pain, then it is high uric acid nephropathy, gout attack.