Finger stiffness and bending with sound finger stiffness and popping, common causes are exertion, stenosing tenosynovitis, rheumatoid arthritis and so on. 1. Exhaustion: fingers after a long time of activity, such as playing the piano, due to overwork, finger stiffness and popping, muscle soreness, is a normal phenomenon, generally can be relieved after appropriate rest. 2. Stenosing tenosynovitis: due to long time playing the cell phone, playing the piano, work, etc., resulting in aseptic inflammation of the tendon sheath of the finger parts, the common symptoms are finger pain, popping, activity difficulties. 3. Rheumatoid arthritis: it is an autoimmune disease, due to the immune system attacking the metacarpophalangeal joints, the structure of the joints is destroyed, causing pain in the finger joints, and the pain is symmetrical, both hands, accompanied by morning stiffness of the fingers, snapping and ringing and other symptoms. Finger stiffness and popping can be caused by a variety of reasons, and may also be related to fractures, tendon injuries, chondroma and other diseases, if the symptoms continue to be unrelieved, it is recommended to consult a doctor in a timely manner, to clarify the cause of the disease, and to carry out targeted treatment.