Ping
It greatly matters, of course, where in the skin the needle is inserted. It is not just a generic chemical response to dermal tissue injury. I have seen this myself in the P6 acupressure point. You get off the correct location by a half centimeter or so and it doesn’t work at all.
Fascinating.
They get it, but they don’t get it. An analogy of the acupuncture system is how a radio deliver sounds. To do this you need the hardware of the radio, and the radio signal carrying the information that the hardware turns into sound, as well as the electricity to drive the radio hardware.
In this case, they focus entirely on the hardware of the radio, looking for a magical component that will generate sound on its own. For a long time they looked for some physical pathway, and now they are looking for a chemical. So, for example, this time they have discovered a single transistor. Is this what makes the radio generate sound?