Yin deficiency of the heart and lungs can be seen in palpitations, heartburn and insomnia, dry cough without phlegm, or sputum is small and sticky, often accompanied by five heart-heat (heat in the hearts of the hands and feet, and self-consciousness of the heart and chest), two zygomatic flushes (cheekbones on the two sides of the face with a reddish color), and night sweating (sweating abnormally after going to sleep, and then stopping after waking up) and other manifestations. Yin deficiency of the heart and lungs is mainly caused by the loss of yin and fluid, the heart and lungs lose nourishment, with the heart and lungs and yin deficiency symptoms as the main manifestation. Heart loss of nourishment (loss of nourishment for the heart) is often manifested as palpitations, heartburn, insomnia, etc. Lung yin deficiency is often manifested as dry cough without phlegm, or sputum is small and sticky, or even with blood in the sputum. Yin deficiency of the heart and lungs is often accompanied by dry mouth and throat, hot hands and feet, flushed cheekbones, night sweats and other symptoms of yin deficiency. Yin deficiency of the heart and lungs is mainly a deficiency of yin fluid, which makes the heart lose nourishment and the lungs lose nourishment, and can have a variety of symptoms, which need to be analyzed in a comprehensive clinical judgment in order to effectively regulate the treatment.