The cause of pestle finger is mostly due to chronic functional cardiopulmonary diseases, such as chronic bronchitis, interstitial pneumonia, pulmonary heart disease, plateau heart disease, dilated bronchitis, congenital heart disease and so on. Pestle finger is mainly characterized by a pestle-like enlargement of the end of the fingers or toes, which will not disappear on its own once it occurs. Pestle finger is mainly related to chronic lack of oxygen, which is mainly caused by cardiovascular and respiratory diseases. And these diseases, after active and effective treatment, the condition can be relieved, appearing no obvious discomfort manifestations of the body. For example, patients with chronic bronchitis in summer and patients with plateau heart disease who are not in the plateau environment may not have any obvious discomfort, but we should pay attention to the observation of the physical condition and give appropriate treatment if necessary. If pestle finger is found, regardless of whether the clinical symptoms are serious or not, it is necessary to seek medical treatment without delay in order to avoid delaying the progress of the disease.