The age of surgery for floating thumb is recommended to be around 6 months to 1 year old, because this is the time when the child’s thumb function is established. If the child is unable to use his thumb at this time, he will try to use his index finger and thumb to pinch objects. There are many cases of this kind, and basically all children with floating thumb encountered in the clinic have more or less the habit of pinching objects, especially in older children. In the long run, the finger body will inevitably have some deformation, which will also have some impact on the child. Secondly, early surgery is also beneficial to the child’s physical and mental development. Children between 6 months and 1 year old do not remember much and are not too clear about the sensation and awareness of the floating thumb, so they are generally not very aware of the difference between themselves and others, and the psychological impact is minimal. If the child’s thumb is corrected at this time, this state will soon pass, because he does not have the memory of the deformity, so he will not feel different when playing with children in the future, and is less likely to have an inferiority complex. Our main treatment for floating thumb is hemi-metacarpal bone graft reconstruction (SMRT floating thumb reconstruction), in which a portion of bone is taken from the second metacarpal bone to reconstruct the first metacarpal bone, and both the donor and recipient metacarpal bones can continue to grow after the surgery if a child has the surgery. This is why we always recommend that the surgery be done early.