Pestle finger is a relatively common clinical sign, mainly manifested as hyperplasia and hypertrophy of the ends of the fingers or toes, with a pestle-like swelling. Pestle finger can be seen in a variety of diseases, most commonly in patients with chronic hypoxia, such as congenital heart disease, respiratory diseases such as bronchial asthma, bronchiectasis, lung cancer, chronic obstructive pulmonary disease, respiratory failure, tuberculosis, etc. Other diseases such as digestive system diseases, nutritional disorders may also appear pestle finger. Once a patient develops pestle finger, he or she should be actively examined to identify the cause of pestle finger and treated for the cause.