Pestle finger is mainly judged by the typical clinical signs of hypertrophy and enlargement of the ends of the fingers or toes. Typical clinical signs of pestle finger are hypertrophy, hyperplasia, and enlargement of the extremities of the fingers or toes in the form of a pestle-shaped enlargement. A basal angle of greater than 180 degrees between the skin and nail on the dorsal surface of each finger is the primary diagnostic modality. The nail has a more pronounced arch and the finger phalanges are thicker. Pestle finger is a tissue proliferation caused by tissue hypoxia and metabolic disorders, which mostly occurs in cardiovascular and cerebrovascular diseases and respiratory diseases, such as congenital heart disease, bronchodilatation, plateau heart disease, interstitial pneumonia, and so on. If patients have obvious signs of pestle finger, they should go to the hospital in time, and after diagnosing the disease through professional physical examination, blood routine, lung function and new function test, treat the primary disease to improve the tissue hypoxia.