Check out this demo on fire cupping. This specific video is showing cupping for shoulder pain relief.
You may remember seeing swimmers in the Olympics sporting big red/purple circular marks on their backs- This is from cupping! Don’t be nervous! This actually feels really good- similar to a massage!
But How Does It Work? Cupping brings Blood and Qi that is stagnated and causing pain in an area up to the surface, allowing for the free flow of qi and blood.
Here is an detailed article by Acupuncture Today on Cupping.