It is not possible to generalize how long a cough from lung yin deficiency lasts. Most coughs caused by Lung Yin deficiency will clear up within 2-3 weeks with proper symptomatic treatment. For more severe cases, more conditioning time is needed. Lung Yin deficiency means that the fluid in the lungs is depleted and the lungs are deprived of the nourishment of Yin fluid, resulting in symptoms such as coughing, dry mouth, night sweating (sweating abnormally after going to sleep, but stopping after waking up), red tongue, and little moss. The duration of coughing varies because of the individual’s condition and constitution. Cough caused by lung yin deficiency, according to the patient’s accompanying symptoms, taking medication is also different, the degree of drug absorption is also different, so the length of the cough can not be judged. It is necessary to look at the recovery situation after the use of medication to determine. It is recommended that the symptoms of discomfort in a timely manner to consult a doctor, under the guidance of a professional doctor’s identification of medication, do not self-medication, so as not to delay the condition.