Treating cough due to lung heat, lung abscess and pus spitting: Reed root enters lung meridian to clear lung heat, and reed cures fever and polydipsia: Reed root tastes sweet and cold, and reed cures heat stranguria and pain: Reed root has the function of clearing heat and diuresis, and can be used to treat heat stranguria and pain, short and red urine. It is often combined with imperata rhizome and Plantago seed. The efficacy and function of reed root, fever and polydipsia. This taste is sweet and cold, which can not only clear lung and stomach qi from excess heat, but also promote fluid production to quench thirst and relieve annoyance. Therefore, it can be used to treat people who are tired of heat and thirst, and drink it frequently with fried thick juice (Behind the Elbow).

Often combined with Ophiopogon japonicus, Trichosanthes root and other medicinal herbs; Or take its fresh juice with Ophiopogon japonicus juice, pear juice, water chestnut juice and lotus root juice, such as five-juice drink (Treatise on Febrile Diseases). The efficacy and function of reed root, vomiting due to stomach heat. This product can clear stomach heat and stop vomiting, and can be decocted with fresh bamboo, ginger, etc., such as Lugen Yinzi 4 cough due to lung heat and purulent lung abscess. This product is good at clearing lung heat when entering lung meridian, and is used to treat cough caused by lung heat. It is often combined with Scutellaria baicalensis Georgi, Fritillaria thunbergii and Trichosanthes kirilowii. For wind-heat cough, it can be combined with mulberry leaves, chrysanthemum, bitter almond and other medicinal herbs, such as Sangju Yin (Treatise on Epidemic Febrile Diseases). For treating lung abscess and pus, it is usually combined with Coix seed and wax gourd seed, such as Weijing decoction (Qian Jin Fang).