Though I am loathe to admit it, there are certain Scientology practices that have valid practical application. One of these is contact assist.
Contact assist is used in physical training situations (such as martial arts) where one partner inadvertently strikes or kicks the other with sufficient force to quickly raise a bruise. It is best done as soon after the occurrence of injury as practical.
The partners return to the place where the injury occurred. Contact is made briefly, repeatedly and gently between the partners at the point of injury (e.g. if the injury was a knee to the forehead, touch the injuring partner's knee to the injured partner's forehead) for several minutes, until pain and swelling subsides. Both partners should focus on draining energy away from the injury.
I know it sounds crazy, but it really works. I've experienced it. We use this in my kung fu system, Mo Duk Pai.