There is no authoritative information to clarify the three contraindications of maitake, it is recommended to follow the doctor’s instructions to use the drug. Maitong has the function of nourishing yin and generating fluids, moisturizing the lung and clearing the heart. Maitong, sweet, slightly bitter, slightly cold in nature. It belongs to the heart, lung and stomach meridians, and is suitable for lung dryness and cough, Yin deficiency and consumptive cough, paralysis of the throat (pharyngeal redness, swelling and pain, or dryness, foreign body sensation, or pharyngeal itching and discomfort, dysphagia), sore throat, thirst due to fluid injury, internal heat and thirst (internal fever accompanied by symptoms such as overeating and excessive urination), heartburn and insomnia, and constipation due to dryness of the intestines. Maitong treatment of yin deficiency cough, dryness injury to the lungs, lung yin deficiency of dry throat and mouth, dry cough without phlegm, often with sasanqua, etc.; treatment of yin deficiency of lung heat, labor cough, or even hemoptysis, often with asparagus. However, the adverse effects of maitong are not clear, and the contraindications are not clear. If you want to use Maidong, it is recommended to ask your doctor before use.