Congenital pediatric flexor tendon tenosynovitis, the so-called board zhouzhou finger, do parents are generally in the child to teach children to put up their thumbs when found that it can not be normal top crook only to find that there is a problem, and then go to the hospital to seek treatment, but there are a small number of careless parents ignore the diagnosis and treatment of their children, and missed the treatment time. Here I put forward a little advice, as long as the two-year-old child found that can not be normal thumb, and no other traumatic reasons, we must consider this problem, in fact, this disease is just flexor tendons can not pass the sheath tube, in the thumb palmar side of the palmar side of the palms can be touched the hard knot. The treatment is to incise the pulley portion of the sheath.