Floating bunions are a type of congenital thumb dysplasia. Many children with floating bunions have a thumb that is basically non-functional and affects the aesthetics of the hand, so many parents are concerned about the impact on their child’s learning and life in the future, and would like to have their child’s floating bunion improved through surgery. So, how old is the right age for a child to have a floating thumb surgery? The thumb takes up 50% of the function of the hand. For a child with a bunion, the lack of function in the thumb will definitely affect the child’s study, work, life and social life in the future, so the child must undergo surgery as early as possible. Nowadays, the main treatment for bunions is Semi Metacarpal Bone Graft Reconstruction (SMRT bunion reconstruction), in which a portion of the child’s second metacarpal bone is taken to reconstruct the first metacarpal bone. The entire surgery is performed on the child’s hand only, so that the child’s foot will not be affected in any way, and the risk of bone resorption and necrosis will be greatly reduced. The earlier the child’s surgery is performed, the earlier thumb function will be established. With hemi-metacarpal bone graft reconstruction, the child’s thumb function and shape will generally be improved.