1, clearing away heat and quenching thirst: reed root is sweet and can produce body fluid, cold nature can clear away heat and reduce fire, upper body can clear lung heat, middle body can clear stomach fire, lower body can facilitate urination, and heat can be discharged from urine. Therefore, for fever, thirst, slight cough, headache and other symptoms caused by febrile diseases, reed rhizome can be used with mulberry leaves, chrysanthemum, forsythia and mint, for example, Sangju drink (mulberry leaves, chrysanthemum, almond, forsythia, mint, bitter platycodon grandiflorum, licorice and reed rhizome) in Treatise on Warm Diseases. Febrile diseases are caused by heat entering qi, and pathogenic heat impairs body fluids, resulting in high fever, sweating, thirst, short and red urine, restlessness and other symptoms. It can be used with Rhizoma Phragmitis, Rhizoma Anemarrhenae, Radix Glycyrrhizae, polished rice and Trichosanthes.
2. Clearing lung-heat: Wind-heat invading the lung causes lung-heat, such as cough, yellow sputum, thirst, itchy throat, chest tightness, and even blood in sputum. Reed root can be used together with almond, platycodon grandiflorum, honeysuckle, gypsum Fibrosum, Fructus Trichosanthis, Fructus Arctii, Folium Isatidis, Scutellariae Radix and fried Gardenia. Lobular pneumonia can also be treated with this recipe. For example, Schizonepeta tenuifolia, Herba Menthae and Folium Perillae (or Herba Ephedrae) can be added for those with aversion to cold, chest pain, tightness and no sweat. Bupleurum and Artemisia annua can be added for patients with cold and heat, chest tightness and pain; Those who are red and hot, thirsty and sweaty can reuse gypsum, reed rhizome and forsythia; For those with more blood in sputum, lotus root nodes, cogongrass rhizome and bletilla striata can be added. Lung abscess (lung abscess) is caused by the accumulation of toxic heat in the lung, the fur is closed by exogenous evil, the lung qi is not clear, the toxic heat does not dissipate, and the stagnation is purulent. The symptoms are chest fullness, chest pain, cough, fever, purulent blood in sputum, and foul smell in sputum.
3, clearing lung and penetrating rash: in the early stage of measles in children, one or two reeds can be used, and a cup of water can be decocted, which can be taken several times a day. Or add the same amount of Xihe willow and decoct it together. The function of clearing away lung heat makes measles easy to come out. Reed roots can be divided into dry reed roots and fresh reed roots. Generally speaking, fresh reed roots are better than dry reed roots in clearing away heat, promoting fluid production and clearing away lung heat and penetrating rash. But if you can't find fresh reed roots, you can also use dried reed roots.
Trichosanthes root inclines to stomach meridian, clearing stomach heat, promoting fluid production to quench thirst, and has the functions of detoxification, detumescence, pus discharge and granulation. Reed root inclines to lung meridian, which has the functions of clearing away lung heat, treating lung abscess and penetrating measles.
The dosage is generally San Qian to one or two for dry people, and five to two for fresh people.