According to Chinese medicine, “all the five internal organs and six internal organs cause coughing”, therefore, there are many causes of coughing, and the treatment methods and medicines differ. Among the various cough suppressants, the most famous one is probably Chuanbei mum, and there are many kinds of cough suppressant Chinese medicines containing Chuanbei mum, such as Chuanbei loquat paste with honey, Chuanbei loquat syrup, and cattle and snake bile Chuanbei liquid, all of which use Chuanbei mum as the main ingredient. So, what is the function of Chuanbei mum? Chuanbei mum is the bulb of a variety of plants of the same genus, such as lily of the valley, dark purple mum, prickly sand mum, Gansu mum, etc. The scales are shaped like small shells, so it is called mum. Among them, the best is the one produced in Sichuan, so it is also called Sichuan mother of pearl. Sichuan maidenhair contains a large amount of alkaloids, which is considered to be its active ingredient. It is bitter, sweet and cool in nature, and enters the lung meridian. It has the effect of clearing heat and moistening the lung, relieving cough and phlegm, and calming asthma. It is very effective for heat coughs, such as wind-heat coughs, dry-heat coughs, and lung fire coughs; however, if you have a cold cough, taking Chuanbei powder is like “adding frost to snow” and is very inappropriate. It has become the experience of many people to drink Chuanbei cough syrup when they have a cough. In fact, not all coughs can be treated with cough suppressants. In fact, boiled pear water with Chuanbei mushroom is indeed a good cough suppressant, but it is for cough caused by dry lung. If the cough is accompanied by a dry and painful throat, and the phlegm is sticky and difficult to cough up, and the chest pain is obvious when the cough is severe, this cough is of a dry and hot nature in the nature of identification, so you can recommend this recipe for treatment: Chuanbei mother of pear 12g, snow pear 2, a little rock sugar. Wash the mother of the Sichuan shellfish, snow pear peeled and cut into several pieces, add a little rock sugar, water, put on the fire and boil for 1 hour. Eat pear, drink soup when taking. Of course, the common duck pear in the market is also effective. However, if the patient’s cough, accompanied by symptoms such as nasal congestion, runny nose, and the coughing out of sputum is white and thin, then this cough in the nature of identification, obviously belongs to the cold cough. Therefore, it is advisable to choose a dietary remedy that dispels wind and cold, resolves phlegm and relieves cough, such as ginger sugar water. If a person with a cold cough eats pear water cooked with Sichuan peppermint, not only will the cough not improve, but there may be an increase in cough and phlegm; if it is accompanied by loose stools and a weak spleen and stomach, this method will be even less applicable.