Summary of case history,　The patient, male, 54 years old, was admitted to the hospital on July 14, 2020 due to "post-activity shortness of breath for 6 years and aggravation for 1 year". Six years ago, the patient developed shortness of breath after exercise (such as climbing three flights of stairs) without obvious inducement, and chest computed tomography (CT) showed "emphysema, bullae of lung, interstitial changes of lower lobes of two lungs". Tiotropium, budesonide, and formoterol were given through inhalation therapy, but the symptoms gradually worsened. One year ago, the patient had severe shortness of breath after exercise, which was manifested as shortness of breath during brisk walking. Blood gas analysis suggested type I respiratory failure, and pulmonary function examination suggested severe decline in diffusion function. The patient was treated with oral prednisone 15mg/d for 3 months, urmepium bromide and verranterol inhalation, but no significant relief of symptoms was found.,Symptoms and signs,　The patient had obvious shortness of breath after the activity, such as brisk walking and climbing two flights of stairs. The patient had dark purple lips, purple claws, and obvious clubbing fingers. The patient had no cough, fever, or chills. The patient had normal sleep, appetite, urination, and defecation. The patient's tongue body was normal and the tongue was light red. The tongue coating was thin and white, and the coating was peeled off in the middle of the tongue, and the pulse was thready and rapid.,TCM disease and syndrome,　Feiwei disease syndrome of qi deficiency and blood stasis,Western medicine diagnosis,　Interstitial lung diseases,Therapeutic methods,　Patient was treated with pirfenidone, prednisone, pantoprazole, and acetylcysteine, Xuefuzhuyutang and Sijunzitang were added and subtracted for treatment.,Clinical outcomes,　The patient's dyspnea symptoms were relieved and the pulmonary dispersion function was slightly improved.