Mirror shadow hand is a very rare congenital malformation, the number of fingers is not equal, the affected hand has no ulnar-radial division, and grows symmetrically, which is named because of its shape like a mirror. The mirror hand lacks a thumb, although there are many fingers, but only the function of bending and pinching, there is no palmar function, can not do pinching movements, only to grasp. If you can’t fully understand it, you can press our thumb and try to do something with the remaining four fingers, you will find that you lose most of the hand functions, which is the approximate state of mirror shadow hand babies. Mirror shadow hand babies should be operated on as early as possible, surgery is recommended at 6-8 months of age, and try to prepare your baby to use their thumb function when it is time for them to establish it. It would be troublesome to wait until the baby is older to correct it, and it will take a lot of time for the baby to adapt and correct the wrong habits of the past.