Stenosing tenosynovitis is a common congenital deformity in pediatric patients, also known as trigger finger, with an incidence of about 2.2%, mainly characterized by flexion deformity of the interphalangeal joint of the thumb, unilaterally, but also in multiple fingers simultaneously. Stenosing tenosynovitis of the thumb in children is associated with congenital factors, such as thickening of the first metacarpal head or thickening of the transverse fibers at the opening of the flexor tendon sheath, narrowing the opening of the tendon sheath and making it difficult for the tendon to pass. It is most often detected weeks or months after birth. Stenosing tenosynovitis presents as a fixed interphalangeal joint of the thumb in flexion with limited extension. Sometimes the interphalangeal joint can be forced to straighten, but soon returns to a flexed position. When the interphalangeal joint is passively straightened, sometimes a popping sound can be heard and some children experience pain. A thickened tendon can be felt on the proximal palmar side of the metacarpophalangeal joint of the thumb, like a “rosary”, which moves up and down with the flexion and extension of the thumb. According to statistics, about 30% of newborns have stenosing tenosynovitis, and 12% can heal spontaneously from 6 months to 3 years of age. surgery before 3 years of age has satisfactory results.