Pestle finger refers to the hyperplasia and hypertrophy of the interphalangeal joints at the end of the fingers, which is in the shape of a pestle, and clinically it is also known as the drumstick finger, which is most common at the end of the fingers or toes. There are many diseases that cause pestle finger, including the following systemic diseases: first, chronic respiratory diseases, mainly due to various kinds of hypoxia leading to interphalangeal joint hyperplasia at the extremities, forming pestle finger, such as chronic emphysema, bronchodilatation, pneumonia, and even in patients with chronic obstructive disease and pulmonary tuberculosis, and sometimes pestle finger can be seen in patients with lung cancer at an early stage. Therefore, if pestle finger appears, it should be noticed. Second, cardiovascular system diseases, also seen in ischemia, hypoxia caused by cyanosis cardiovascular diseases, such as severe cardiac malformation, tetralogy of Fallot, infective endocarditis, pericarditis, bacterial meningitis and so on. Thirdly, it is also seen in digestive system diseases, such as ulcerative colitis, chronic bacterial colitis, Crohn’s disease, and so on. Fourth, it is also seen in idiopathic osteoarthropathy, which is the proliferation of finger joints, and there are no other systemic diseases, including spinal cord cavities, poisoning by special poisons, etc. Therefore, after the emergence of pestle finger, especially the recent emergence, should go to the hospital for corresponding systematic examination, in order to exclude other diseases caused by pestle finger.