Pestle finger is a deformity in which the ends of the fingers or toes are enlarged, hypertrophied, widened, and thickened, and the distal knuckles are arched and bulged in a pestle-like expansion from root to end. The symptom is usually symmetrical attack of both hands and feet, the cause of pestle finger has a lot to do with respiratory diseases, commonly found in idiopathic interstitial pulmonary fibrosis, bronchiectasis, lung cancer, etc.; in addition, there is a certain relationship with chronic hypoxia, due to hypoxia after the endings of the limbs will be compensatory hypertrophy, hyperplasia, so it leads to the end of the bulging drumstick-shaped. The treatment of pestle finger is based on the treatment of the primary disease that causes the occurrence of pestle finger, and the use of oxygen therapy as an auxiliary treatment. Patients who experience these symptoms need to seek medical attention for further examination to avoid delays.