Platycodon grandiflorum in water has the efficacy of promoting lung, expectorant, phlegm, etc., but Platycodon grandiflorum in water is limited to the precipitation of active ingredients, it is recommended to use the method of decoction to take. Platycodon grandiflorum, for the Platycodon grandiflorum family Platycodon grandiflorum genus of plants dry roots, taste bitter, pungent, sexual flat, belonging to the lung meridian, is a clinically commonly used to clear the heat of phlegm medicine, with the lungs, expectorant, pharyngeal, pus efficacy. It is mainly used to treat cough with excessive phlegm, loss of voice, lung carbuncle spitting pus, chest congestion, sore throat and other conditions. In addition, this product can promote the opening of lung qi and facilitate bowel movement, which can be used to treat illnesses such as retention of urine, constipation, and also can be used as a medication for the treatment of chest and diaphragm above the introduction of menstruation. It should be noted that excessive use of Platycodon grandiflorum may lead to nausea and vomiting. Contraindications are not clear. Platycodon grandiflorum in water can play a limited medicinal effect, can not replace the drug treatment of disease. Discomfort should be timely medical treatment, under the guidance of the doctor to choose medication, not self-medication.”