Pestle finger pre-symptoms are usually manifested as soreness and thickening of the nail involving the fingers and toes, as well as arthritis, which is typically characterized by thickening and hypertrophy of the ends of the fingers or toes, accompanied by a feeling of swelling and so on. Pestle-like finger is characterized by the obvious widening and thickening of the ends of the fingers (toes), and the formation of a bulge at the end of the nail from the root, so that the skin on the back of the nail and the nail form a basal angle form greater than 180°. The formation of pestle finger is mainly related to the end of the limb for a long time lack of oxygen, and lead to the formation of pestle finger more causes, such as cyanosis congenital heart disease, respiratory diseases, digestive system diseases, nutritional disorders, and congenital syphilis, arsenic, phosphorus, alcohol poisoning, and some other causes. If the patient has the symptoms of pestle finger, must go to the regular hospital in time for examination to clarify the cause of the disease and standardized treatment under the guidance of the doctor.