A high-salt diet can bring the following hazards: 1. It puts a heavier burden on the heart and kidneys, because as salt increases, the water in the body increases, it puts an excessive load on the heart and kidneys, and the whole circulatory system is overloaded, making it easy to have swollen legs, swollen feet, and even shortness of breath; 2. It causes the blood pressure of hypertensive patients to be more difficult to control, even if they take 3 or even 4 kinds of antihypertensive drugs, their blood pressure is still poorly controlled and It is difficult to reach the ideal state; 3. High salt can make patients less sensitive to drugs and cause obvious water and sodium retention problems. In conclusion, a high-salt diet is not beneficial to patients, but only brings many disadvantages, and a low-salt diet is advocated clinically, especially for patients with hypertension and heart disease.