The bulging of the end joints of the fingers is often considered to be a sign of mortar and pestle finger, or rheumatoid arthritis, which affects the large joints of the knee, ankle, and so on. The bulging of the end joints of the fingers can be a symptom of a variety of diseases. If it is combined with emphysema, chronic pulmonary heart disease and other cardiopulmonary diseases, it is most often considered to be the mortar and pestle finger. Rheumatoid arthritis involving the terminal interphalangeal joints is usually considered if it is accompanied by morning stiffness in the joints, symmetrical swelling and pain. If the combination of elevated blood uric acid and severe pain in the joint elevation area, gouty arthritis is most often considered. Rheumatoid arthritis is one of the manifestations of rheumatic fever, which mostly involves large joints such as knees, ankles and shoulders symmetrically, and less often involves the terminal joints of the fingers. It is recommended to consult the hospital in time to make a clear diagnosis of the bulging joints at the end of the fingers, and treat the symptoms under the guidance of the doctor.