The ancient Chinese doctors were practicing thousands of years before we had modern blood tests, MRI’s and x-rays. They had to learn to read the signs on the body to determine what was happening in the internal organs. One of the signs that they developed and we still use everyday in our practice is inspecting the tongue.
Clients often giggle a little when I ask them to stick out their tongue so I can look at it. It has often been years since they have stuck their tongue out at anybody!!...More Info