Long periods underwater or exposure to running water can make the scabs or softened new skin fall off. This prolongs the healing process. Immersion in cold water for more than a minute or two slows down blood flow, which in turn slows down scar healing.
I had a pretty bad ankle break (both bones), long story short I needed surgery. Four inch long incision with 12 staples to hold in the plate and eight screws that were installed. This was in February. After several months of using Scarfade, which by the way I am still on the original tube, only using a button size drop a day. I cannot feel any skin imperfection it is as smooth as before and the staple scars are nearly gone. The main incision is about 50% less noticeable as right after surgery. This stuff rocks!!!!!! Thanks for a great product!!!!