Moistening lung, relieving cough, preventing colds, expelling toxin and enhancing immunity. The boiled water of loquat leaves has three main functions: First, it has the function of moistening lung and relieving cough. Boiled water of loquat leaves can eliminate inflammation in trachea, and has good curative effect on cough, expectoration and phlegm adhesion caused by respiratory tract infection, which can keep respiratory tract unobstructed and relieve symptoms. Second, to prevent colds, boiled loquat leaves have certain antiviral ability, especially in the autumn and winter flu epidemic, which can reduce the occurrence of influenza to a certain extent, even if you catch a cold, it can also reduce the harm caused by a cold. Thirdly, boiled water of loquat leaves can detoxify and enhance human immunity, which can promote the discharge of toxic substances in the body. At the same time, by adding trace elements to enhance human immunity, it is helpful to prevent various tumor diseases and enhance the resistance of elderly patients.