Salt is a common condiment in daily life, and its proper consumption helps to maintain a constant osmotic pressure inside and outside the cells and plasma osmolality, which is an important prerequisite for maintaining normal physiological activities of the body. Excessive salt intake can cause irritation to the gastric mucosa and may also induce hypertension, cardiovascular and cerebrovascular diseases, and increase the metabolic burden on the kidneys with edema and other manifestations, etc.: 1. Upper respiratory tract infections: Some studies have found that excessive salt intake, whose main component is sodium chloride, affects the defenses of the oral and ocular epithelial cells, reduces saliva secretion in the mouth to make the mouth dry, and viruses and other pathogens are more likely to invade the respiratory tract and appear 2, gastric mucosal damage: excess sodium chloride into the stomach, due to the imbalance of osmotic pressure so that the gastric wall cells, gastric mucosa water transfer, can directly damage the gastric mucosa, can also change the nature of the mucus secreted by the gastric mucosa, reduce the protective mucus to the gastric mucosa, so that the gastric mucosa is vulnerable to food components and bacterial damage, may cause gastritis, gastric ulcers and other diseases, epigastric pain 3, cardiovascular disease: excessive salt intake can increase the plasma osmolarity in the body, causing cellular dehydration, which increases the amount of blood circulation in the body, making the long-term high salt diet prone to hypertension. For people with basic cardiovascular pathology, excessive salt intake may induce heart failure, heart attack, stroke and other episodes; 4, increased kidney burden: excessive intake of salt can cause water and sodium retention in the body, increasing the burden on the kidneys, prone to edema performance, with basic kidney pathology, the intake of large amounts of salt may lead to further deterioration of kidney function. In addition, excessive salt intake may cause high sodium content in the body, leading to cellular dehydration, dry skin, wrinkles and other skin problems, as well as thirst from time to time. A large intake of salt at one time can cause a serious imbalance in osmotic pressure, which can even be life-threatening.