Repairing damaged energy foundations... Who would think of such a thing?
The energy-gathering center that lies below the navel is one of the most protected areas in the body of any living being. A direct blow there often means death. The last thing a person has to worry about at that time is losing his energy foundation!
As for the people who were lucky enough to survive an injury in that area but with the energy-gathering center had been punctured, they can only continue their lives as ordinary mortals, there was no known item that could heal the energy-gathering center if it was damaged from the outside, by then it would be like a punctured bottle and reddened useless.