Here is how to treat jaw lock. When the jaw locks in a closed position and you cannot open your mouth, it can be called a closed lock. Here’s a prescription you may want to try. Dr Huh Im, a Korean doctor in the 1600s recommends the point KI 2 ?? for the condition. He didn’t mention acupuncture or moxibustion. Both may work.
Here are some more articles for moxibustion if you may like to read.