There are many reasons for the bending pain of the middle finger, and the common ones are tenosynovitis, rheumatoid arthritis, trauma and so on.
1. Tenosynovitis: Inflammatory reaction caused by excessive friction between tendon and tendon sheath at the middle finger joint and edema of tendon sheath tissue. Typical symptoms are localized pain, pressure pain, limited joint movement, etc., which is manifested as pain when the finger is bent.
2. Rheumatoid arthritis: the onset of the disease is hidden, usually from the proximal interphalangeal joints, metacarpophalangeal joints, wrists and other small joints, and gradually symmetrical involvement of multiple joints, the typical inflammatory symptoms of the joints for the morning stiffness, swelling, pain and so on. If the middle finger joint is involved, it can lead to serious deformation of the joint and painful bending of the fingers.
3. Trauma: such as middle finger sprain or severe contusion caused by middle finger joints around the tissue congestion and swelling, bending the finger will also cause pain.
Finger bending pain in the middle finger may also have other causes such as septic arthritis, etc. It is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease and standardize the treatment.