It is generally believed that patients without oliguria and non-significant edema do not necessarily need to be absolutely salt abstinent, and eating lighter food is sufficient. Where there is severe edema, hypertension or heart failure, salt should be strictly avoided. If you do not pay attention to the control of salt intake, you should aggravate water and sodium retention, which in turn will increase hypertension, aggravate heart failure and develop hypertensive disease, which can lead to death in serious cases. In this case, not only general salt should not be eaten, but even foods with high sodium content, such as soda crackers, noodles, doughnuts, meat loaf, etc. should not be eaten. Only when the urine output increases and the edema subsides can a low-salt diet be gradually introduced. When salt is avoided, the two most commonly used salt substitutes are as follows: 1. Salt-free soy sauce It is made of potassium salt and can be used if there is no renal insufficiency, urine output is more than 1000 ml per day, and there is no hyperkalemia. It can be used for patients with high blood potassium and poor heart function. It is divided into two types: light autumn stone and salty autumn stone. The main component of light autumn stone is calcium urate and calcium phosphate, and does not contain sodium salt, so it can be taken; salty autumn stone contains sodium chloride, so it should not be used.