Mortar and pestle fingers are a specific clinical manifestation of human body checking, which manifests as enlarged fingers of the extremities, including the ends of the toes, like a drumstick. Mortar and pestle fingers occur and have a strong relationship with respiratory diseases, commonly found in, for example, idiopathic interstitial lung fibrosis, bronchiectasis, and lung cancer. Most of the pestle finger occurrence is related to chronic hypoxia, because after hypoxia, the end of the limb, will compensate for hypertrophy and hyperplasia, so it causes the end to expand to form a drumstick shape. If you see a pestle finger formation, you should first consider the three types of diseases mentioned above and screen accordingly.