Generally speaking, newborns do not undergo syndactyly unless there are very special circumstances, such as blood flow disorders due to the restraint of the band, then we do the syndactyly when the band is released. In children, juxtaposition is usually done around six months of age, when the child’s physical condition is better and the likelihood of web crawling after juxtaposition is relatively low. If the whole hand is not separated as early as possible, the development of the whole hand will be greatly affected, so we need to separate the fingers as early as possible.