Hi and thank you for your question and sharing your concerns. I am not aware of any research pertaining to icing after the facelift procedure, and it very well could be that "statistically", it didn't show to improve the severity or duration of swelling and bruising. In our experience, icing for the first 48 hours does seem to reduce the amount of swelling after a facelift and we always recommend it. It probably has something to do with reducing inflammatory surges in blood flow to the area thereby reducing how much fluid extravasates into the tissues causing swelling. After 48 hours, the effect is less noticeable and as other have mentioned, only used for comfort if need be. Hope that helps! Best, Dr. Roy.