Cryosurgery may be effective in reducing the hardness and size of keloid scars, particularly when they are small. It works by freezing the tissue, which can help to break down the excess collagen that forms the keloid. However, the effectiveness of cryosurgery may vary. Some studies suggest that cryotherapy may not always be effective for keloid scars, and there is a risk of triggering the formation of new keloids in individuals prone to this type of scarring.