Pestle finger is mainly characterized by bulging of the ends of the fingers, with the nails bulging in an arch from the root, resembling a drumstick-like appearance. At the same time, it is often accompanied by primary lesions. Pestle finger is mainly manifested as a localized abnormal appearance of the finger, which is mostly seen in patients with chronic diseases, such as: circulatory system diseases (cyanosis congenital heart disease, subacute infective endocarditis, etc.), respiratory system diseases (chronic lung abscess, chronic pyothorax, chronic bronchitis and emphysema, etc.), digestive system diseases (chronic ulcerative colitis, intestinal tuberculosis, cirrhosis of the liver, etc.). Therefore, in addition to the localized abnormalities of the fingers, patients with pestle finger tend to have symptoms of the original disease at the same time. Taking respiratory lesions as an example, patients may be accompanied by coughing, coughing up sputum, blood in sputum, dyspnea, chest tightness and shortness of breath. It is recommended that patients seek early medical attention to confirm the diagnosis of the lesion and actively treat it through history taking, physical examination, ultrasound, chest radiographs, CT, pathology, and other tests.