Condition analysis: The skin defect area of the back of hand is so large that the scar of dressing change can be healed. If the wound is fresh, it will take more than a month to completely heal. However, if the scar on the back of the hand is healed in a large area, it is likely to form contracture and affect the function of the hand.

Suggestion: such a large area usually needs skin grafting. Through transplantation, the wound on the back of the hand is repaired by normal skin, which will have nearly normal elasticity and tension, and the influence on the function of the hand will be as small as possible. If the skin is grafted, it will usually heal in two to three weeks.