There are no three kinds of people who should not eat tian dong. Generally, people with external wind-cold, phlegm-dampness cough, as well as those with little food and loose stools (thin and unshaped feces), and those with deficiency of spleen and stomach (spleen and stomach are weak and cold) should not eat tian dong. Tendong can be used for dry lungs and coughs, and kidney yin deficiency. Tendon is the dried tuberous root of Tendon, family Liliaceae, which belongs to the lung and kidney meridians, with sweet, bitter and cold medicinal properties. It has the efficacy of generating fluids and clearing the lungs, nourishing yin and moisturizing dryness, and is suitable for the symptoms of kidney yin deficiency such as lumbar and knee aches and pains, internal heat and thirst (internal heat accompanied by symptoms such as eating more, drinking more and urinating more), and tidal fever of bone vapor (a burst of heat, feeling that the heat is penetrating from the inside of the bone outward), etc. It can also be used for lung dryness and dry cough. This product can also be used for dry lung dry cough, cough and hemoptysis, cough phlegm viscous, there is a strong lung fire, nourishing yin moisturizing lung (supplement the body of yin to moisturize the lungs) function; heat disease injury, internal heat and thirst (fever accompanied by symptoms such as eating, drinking, urinating, etc.), intestinal dryness, constipation, dry pharynx and thirst. This product is not suitable for people with external wind-cold, phlegm-dampness cough, as well as loose food (thin and unformed feces), spleen and stomach deficiency (spleen and stomach weakness and cold), and the adverse effects are not yet clear. The drug should be applied reasonably according to the doctor’s instructions.