If edema of the feet, especially the soles of the feet, occurs, there are usually the following diseases: 1. The most common cause is malnutrition edema, and lack of protein intake in the body when malnutrition is present, or insufficient intake for a long time will lead to edema, which is especially significant in the lower parts of the body, such as the soles of the feet. 2. Chronic heart failure, such as left heart failure, total heart failure, and right heart failure will lead to lower limbs, especially low hanging parts of the lower limbs, and edema will appear on the soles of the feet. 3. 3. renal insufficiency, there will be a large amount of proteinuria and hypoproteinemia, accompanied by swelling and edema. 4. patients with hypothyroidism will also have anterior tibial mucinous edema.