Pestle finger can be simply self-tested by observing the ends of the fingers (toes) for features such as hyperplasia, hypertrophy, and a pestle-like enlargement. Pestle-shaped finger is mainly manifested as the soft tissue of the fingers or toes is enlarged like a drumstick, the main feature is that the end of the fingers and toes have obvious widening and thickening, and the fingernails (toes) from the root to the end of the arch-shaped bulge. Patients can conduct preliminary self-tests by observing whether there are any abnormalities in the fingers (toes). The development of pestle and mortar fingers is usually associated with severe lung disease, heart disease, and other chronic, serious conditions. If the condition is mild, pestle finger is less noticeable and can be easily overlooked. Pestle finger is not a specific symptom, and it is recommended that patients seek medical attention to clarify the diagnosis and take treatment when an abnormality occurs.