Here's another common question that comes into my office on a regular basis. "I have a new knee (or hip) replacement, but I still have pain.  Why?"
Recent research out of Rutgers University has found that microparticles or "debris" from artificial joints can trigger an immune system response around the surgical site.  Swelling and pain can be the result.  Over time, this chronic inflammation can cause tissue damage that eventually wears out the implanted joint.  For more information, visit ​https://www.futurity.org/joint-replacement-pain-bones-1962162-2/

In my practice, I must get this question from curious patients at least once a week.  My answer is usually "it depends on who you ask".  It's commonly held knowledge that about 3,000 years ago, some scholars in China decided to write down all the meridian theory and point locations and make it into a comprehensive system of medicine.  

But if you ask an anthropologist, you may hear about the interesting tattoo markings on Otzi, the 5,300 year old mummified "iceman" found in the Austrian Alps in 1991.  There's a lot of compelling evidence that what we call acupuncture may have existed long before it became Chinese Medicine:

https://www.smithsonianmag.com/smart-news/what-otzi-icemans-tattoos-reveal-about-copper-age-medical-practices-180970244/