Bad kidney is usually not fat, the manifestations of bad kidney are edema, oliguria, hypertension, anemia, loss of appetite, dull face and so on. However, if patients with kidney disease apply hormone therapy for a long time, they will appear, such as full moon face, buffalo back and other manifestations of Cushing’s syndrome, and people will look fat, and its mainly due to the disorder of metabolism of water, salt, sugar, protein and fat in the body. When the kidney is not good, edema will appear, and the mechanism of its occurrence includes the loss of protein, the decrease of plasma and colloid osmotic pressure, which causes water to overflow from the vascular cavity, and the decrease of circulating blood volume, which further activates the renin-angiotensin-aldosterone system, which further aggravates the water and sodium storage, and also further appears obvious edema, and when edema is obvious, people will look fatter and gain weight, and if there are If there are signs of edema, it is recommended that you should seek medical attention immediately for proper disposal.