Suppurative tenosynovitis

Most are caused by stab wounds on the palm side of the fingers, while blood-borne infections are rare. The sheath is rich in synovial fluid, moist and less bloody, which provides favorable conditions for infection. Once an infection occurs, the inflammation quickly spreads throughout the sheath. The sheath and sheath infection of the thumb and little finger can also spread to the radial or ulnar bursa and spread to the forearm. In the narrow space of the fibrous sheath, inflammation itself and exudate tension can disrupt the blood circulation of the tendon and cause tendon necrosis. Even if the tendon is not necrotic, adhesions often occur after the inflammation is healed, which seriously affects the function of the fingers.