The other day I received a private message from a mom who wanted to ask about floating thumb. Her baby is now 2.5 years old and was born with floating thumb, and this mom said she didn’t know that her baby’s condition was called floating thumb until she brushed up on my videos. Many parents may not know much about the floating thumb. In fact, from the appearance, the child’s floating thumb is a floating state, the thumb is relatively short, no tendons, no bones connected to the palm of the hand, the middle is a skin connected to the palm of the hand; from the functional point of view, the child’s floating thumb has no function, flexion, extension, pinching, pinching and other actions can not be completed, the floating thumb can only be shaken with the swing of the hand. As the thumb takes up 50% of the hand function, floating thumb seriously affects the hand function and appearance, so parents must pay attention to it and treat it when their children are small. The most advanced treatment for floating thumb is hemi-metacarpal bone graft reconstruction (SMRT floating thumb reconstruction), which can be performed between the ages of 6 months and 1 year and can help children establish thumb function sooner. With hemi-metacarpal bone graft reconstruction, the child’s floating thumb can be preserved and the finger is more complete. Through post-surgical recovery exercises, the child’s thumb function and shape will be well improved, and there will be no problem in writing, drawing, holding chopsticks, etc.