Analysis:
Saliva is a treasure, don't spit it out easily.
Chinese medicine believes that saliva is a kind of body fluid, which plays an important role in health preservation. Also known as "Joan Award", "Golden Paste", "Golden Gold", "Jade Liquid", "Yuquan" and "Water of Huachi". In ancient medical books, the methods of prolonging life for long-lived people are pharynx and saliva. Tang Sun Simiao recorded a story in Emergency that Cao Cao asked Huang Huanglong the secret of health and longevity: Cao Cao asked Huang Huanglong why he was still hearing and seeing and his physical strength remained unchanged when he was over 100 years old. Huang Huanglong replied that Kuaijing lived 178 years old and was still very strong, relying on chewing his teeth and swallowing saliva before getting up in the morning. I learned from his experience and lived for a long time. Li Shizhen said: "Sperm spitting is transformed by sperm." In Compendium of Materia Medica, he said: "If people can not vomit every day, their essence will always exist, their faces will be beautiful, their eyes will be bright and their ears will be bright. On the contrary, if you spit frequently, it will damage your spirit and make your face dry. Li Zhongzi said in "Hospital Required Reading" that the ancients used thousands of saliva as movable type, which shows that the ancients attached importance to the role of saliva.
It is a good physiological reflection to practice qigong and increase saliva. Chewing saliva slowly has the functions of washing viscera, invigorating spleen and stomach, strengthening kidney, moistening limbs and hair, enhancing disease resistance and preventing aging.
Modern medicine has also deepened the understanding of saliva function. It was previously recognized that saliva can promote digestion. In recent years, it has been found that saliva contains a lot of biochemical substances, which plays an important role in maintaining normal life. If it contains two kinds of nerve factors, it can sense the normal growth and activity of nerve and sympathetic nerve, and several kinds of protein can promote hemostasis and constrict blood vessels. Secretory immunoglobulin A and lysozyme contained in saliva have immune and antibacterial effects, which can kill some bacteria in the mouth, neutralize the acid produced by some bacteria in the mouth and protect gums from tooth decay. Salivary hormone is a kind of protein composed of various amino acids. Although its content is small, it has great effects. It can promote cell division and growth, accelerate the synthesis of ribose, nucleic acid and protein, maintain the stability of blood sugar, regulate the balance of sodium ions in the body, and promote the growth of human bones, muscles, joints, eyes and teeth. It has beneficial effects on moistening oral cavity, stopping bleeding and healing, defending bacteria, helping digestion and promoting growth and development. At present, the medical profession has been able to extract salivary gland endocrine for the treatment of senile diseases, with good results.