Maitake water may have the effect of nourishing yin and moistening the lungs, but the water may not be able to completely precipitate the active ingredients of the drug, and only one Chinese medicine, with limited efficacy. Mai Dong is the dried tuberous root of the lily plant Mai Dong. It is sweet, slightly bitter and slightly cold in nature. It belongs to the heart, lung and stomach meridians. It can nourish yin and generate fluid, moisturize the lung and clear the heart. It can be used for dry cough, cough with deficiency of yin, paralysis of the throat (pharyngeal redness, swelling and pain, or dryness, foreign body sensation, or pharyngeal itching and discomfort, difficulty in swallowing), sore throat, thirst with injury to the fluids, thirst with internal heat (internal heat accompanied by symptoms such as overeating, drinking, and urinating), heartburn and insomnia, and constipation with dryness of the intestines. Because of the cold nature of maitake, it is contraindicated for those who have loose stools due to spleen deficiency, those who have phlegm in the lungs and stomach, those who have dampness and turbidity, and those who have coughs due to wind-cold at the beginning of the day. Patients are advised to use the medicine under the guidance of a doctor.