Pestle finger looks like a highly curved longitudinal and transverse ridges of the nail from the root to the end of the nail, with a spherical glassy surface and an arched bulge in the shape of a pestle. Pestle finger, also known as drumstick finger, occurs due to a variety of reasons, such as bronchiectasis, tetralogy of Fallot, cirrhosis, etc., resulting in the body’s end of the limb circulatory disorders, chronic hypoxia, metabolic disorders, or toxicity injuries, resulting in the end of the limb capillary proliferation, dilatation, soft tissue hyperplasia, which causes the end of the hyperplasia bulging in the form of a ball-shaped bulging, pestle-shaped finger. When the patient appears pestle finger, should be alert to the patient may suffer from respiratory, digestive, cardiovascular system diseases, at the same time need to be identified with the finger of acromegaly, etc., to the relevant hospitals for further examination, under the guidance of a professional doctor for active treatment.