Feels like when you put icy hot or mineral ice on a sensitive area of your body and it starts to burn, so you put a cold washcloth on the area to try to subdo the burning feeling, but instead the burn increases. Thats about how much it burns
. Not unbarable like I've read from other people. If you have gone thru child birth or root canal or sprained or broken anything even a toe. All those things hurt way worse. The pain for me happened the next day, Saturday.