Congenital stenosing tenosynovitis of the flexor tendons in infants and young children occurs predominantly in the thumb, with a slight prevalence in females. The exact pathogenesis is not clear, but it is hypothesized that the thumb is in constant hyperflexion during fetal life, resulting in stenotic compression at the entrance of the fibrous sheath on the metacarpophalangeal side of the narrow finger joints, and proximal flexor tendon enlargement, which makes it difficult for the tendon to pass through the sheath. The child’s thumb interphalangeal joints are flexed, and if the interphalangeal joints are passively forced to straighten, there is a “trigger” sound and the child cries. It is usually noticed by the mother a few months to a few years after birth, or by the physician when the child presents to the hospital with another medical condition. In congenital stenosing tenosynovitis of the finger flexor tendons in infants and children, cambell advocates further observation. Most of the children can recover spontaneously at 6 months of age, and almost all of them can recover spontaneously within 2 years. 1978, Daozhen and other scholars reported a group of follow-up results, 78% of the children recovered spontaneously after 3-4 years of age; those who could not recover spontaneously could not be treated surgically before the age of 5 years, but if there was a limitation of the extension of the interphalangeal joints after 10 years of age, then surgical treatment was needed. Generally speaking, after the diagnosis of congenital stenosing tenosynovitis of the finger flexor tendons, intratendinous injection of steroids and fixation of the interphalangeal joints in the straightened position can be carried out first. After these conservative treatments, most of the symptoms can be relieved to disappear. When the conservative treatment is ineffective, the feasibility of stenosing tenosynovitis incision and release surgery. Indications: 1, recurrent, long duration of stenosing tenosynovitis, by local discussion closed and other conservative treatment is ineffective. 2, congenital stenosing tenosynovitis of finger flexor tendon can not be observed for more than 2 years, or by conservative treatment is invalid.