When is the right time to have surgery for a child with polydactyly (or polydactyly) found after birth? This is one of the most common questions asked by many parents. Congenital polydactyly is mostly seen in the thumb and little finger and is genetically related. It should be surgically removed as early as possible to improve the appearance and preserve or reconstruct the normal function of the finger. The key issue in this surgery is the functional reconstruction of the joint after surgery. To achieve good post-operative functional preservation and reconstruction depends on the accurate identification of the anatomical structures, the operator’s experience, and the delicacy of the technique during surgery. Generally speaking, the older the child is, the more mature the tissue development and the clearer the anatomical structures are, the better for surgery. Therefore, the surgery should not be done too early, preferably after 9 months of age. On the other hand, the earlier the surgery, the better the development of the preserved limbs, just like cutting branches for a tree, the earlier the lateral branches are cut, the better the growth of the main part of the trunk that remains. Therefore, the surgery should not be done too late. In summary, the appropriate time for surgery is generally considered to be 9 months to 12 months. If the operator is skilled, experienced and responsible in surgery, a smaller one can be done, and the smallest case our team has done is 6 months.