The symptoms of lung yin deficiency mainly include cough, mainly dry cough, no sputum or little sticky sputum, or even blood in the sputum, as well as dry nasopharynx, peripheral heat, night sweating, insomnia, loss of weight, flushing of skin on both sides of the cheekbones, as well as feeling hot and bothered in the palms of the hands, feet and forehead, red tongue with little moss and fine pulse. Lung yin deficiency is mainly caused by lung heat injuring yin and fluid over time, or obvious yin deficiency around the body, and fluid cannot nourish the lungs, manifesting as deficiency-heat symptoms. Daily diet should pay attention to eat less fried and other hot things to avoid more injury to the fluids, can eat more lily, honey, pear, white radish and other things that moisten the lung, down the air, cough.