The treatment of adult flexor tendon stenosing tenosynovitis with needle knife and manipulation has the characteristics of small injury, simple operation and one-time cure, which is worth promoting and applying in the orthopedic injury clinic. 1.Treatment method After local disinfection with iodine and alcohol and laying sterile hole towel, after local anesthesia with 1% lidocaine 2ml, use 1mm diameter flat spade needle knife to pierce the skin vertically at the midpoint of the palmar side of the metacarpal head of the affected finger, and make an “ellipsis-like” point cut from the distal edge of the palmar tendon membrane slide to the proximal end, about 0.8cm long; then make an “ellipsis-like” point cut along the first edge of the tendon sheath Each cut point should be connected to each other as much as possible, and the blade must be perpendicular to the palmar tendon slider and the fibers of the first circumflexor ligament of the tendon sheath and parallel to the fibers of the flexor tendon when cutting. The needle tip blade has obvious resistance when touching the palmar tendon membrane glide and tendon sheath annular ligament fibers, and there is a breakthrough feeling when cutting, after cutting one place, the needle knife will be retreated to the surface of the palmar tendon membrane glide and tendon sheath annular ligament and then cut the second place, and so on repeatedly until the palmar tendon membrane glide and tendon sheath annular ligament are all cut, and the needle knife will be withdrawn; the operator holds the affected palm with the left hand, presses the needle eye with a sterile gauze, and holds the affected finger with the right hand to straighten it. At the same time, the patient is asked to flex the affected finger against each other, repeatedly for 3~5 times, the palmar tendon membrane slide and the first annular ligament of the tendon sheath can be completely cut and loosened or partially cut and extended, so that the narrow tendon sheath is completely loosened. The success of the release can be determined by examining the affected finger after the operation with free movement and no local popping and sliding sensation. The postoperative eye is covered with sterile gauze, and the patient is encouraged to resume normal activities of the affected finger from the second day to avoid recurrence of adhesions. 2.Pathogenetic site and cause: adult flexor tendon stenosis tenosynovitis stenosis site are in the metacarpophalangeal joint palmar tendon membrane slide (PA) and the first annular ligament (A1), this is the tendon and tendon sheath friction stress site, repeated strain stimulation tendon sheath synovial inflammatory reaction, tendon sheath tissue hyperplasia and cause tendon sheath stenosis, coupled with the palmar tendon membrane slide (PA) and the first annular ligament (A1) The flexor tendon between the palmar side of the tendon sheath and the palmar side of the tendon sheath is not wrapped and formed pike expansion, thus increasing the resistance of the tendon to slide in the tendon sheath, further aggravating the inflammatory reaction, forming a vicious circle, when the stenosis develops to a certain extent, it can appear strangulation and aggravate the finger flexion and extension dysfunction. 3, the characteristics of this method: flexor tendon stenosis tendinitis application needle knife treatment has better efficacy, but pure needle knife loosening sometimes can not achieve a loosening in place. This method, on the basis of needle knife release, together with manual release, can make the palmar tendon membrane slide and the first annular ligament of the tendon sheath be completely cut and released or partially cut and extended, so that the narrow tendon sheath is completely released.