From the perspective of healthy adults diet is also recommended to patients to low salt diet, completely can not eat salt disease should be no, completely do not eat salt patients may exist hyponatremia, serious hyponatremia may be life-threatening death, not completely can not eat salt. There are some diseases that recommend a low-salt diet, first of all, hypertension, eating too much salt will lead to hypernatremia, hypernatremia will lead to water and sodium retention and thus increase the patient’s blood volume, which in turn will cause an excessive increase in blood pressure. Secondly, patients with renal insufficiency and liver insufficiency are also advised to reduce salt intake, for the same reasons as hypertension.