Pestle finger refers to a marked widening and thickening of the terminal phalanges, with a curved bulge of the nail from the root to the end. Cough with pestle finger can be seen in bronchiectasis (bronchiectasis can be classified as congenital or secondary. Congenital is less common and is due to congenital bronchial dysplasia, the presence of congenital defects or genetic disorders. The main pathogenic factors in secondary bronchiectasis are recurrent infections of the bronchi and lungs, bronchial obstruction and involvement of the bronchi, with the three factors interacting with each other…) , chronic abscesses. So, what is the diagnosis of cough with pestle finger? The following are the diagnostic bases for cough with pestle finger: 1. History of respiratory tract infections that induce bronchiectasis in early childhood, such as measles, pertussis or post-influenza pneumonia, or history of tuberculosis, etc. 2, the presence of long-term chronic cough, coughing pus sputum or repeated hemoptysis symptoms. 3.Physical examination of the lungs with fixed and persistent wet on auscultation? sound, pestle-like fingers (toes). 4, X-ray examination shows increased, thickened and disorganized lung texture, in which curly hair-like shadows can be seen, and small liquid flat appears in co-infection, and CT typically shows orbital sign or ring sign or grape sign. Definitive diagnosis depends on bronchial iodine oil angiography or HRCT. suspected congenital factors should be related tests, such as serum Ig concentration determination, serum gamma;-globulin determination, pancreatic function test, nasal or bronchial mucosal biopsy, etc.