You may not have been exposed to it, ever, or just not yet. It’s a technology called K-laser, or red light therapy. It’s the direction of intense red light of a particular wavelength (680nm) (Here’s one of those lights) at the damaged cells in a surgical or diseased area of the body. Until they know how it works, people have a tendency to think it is nothing but snake oil but once you understand how simple it is, you will just be amazed. It is based on the identical chemical reaction that powers lowly algae.
“Erik, we have been doing the K-therapy since last Thursday morning. It seems to have helped her, and my aching thumb feels better. I am able to play guitar again. Go figure. Thanks for the suggestion.”