Pain and chronic conditions

In Chinese medicine, the explanation of why there is pain is because the qi flow is stuck or stagnant and not free flowing as it should be.  There can be many reasons why the qi is block from its natural flow that is usually categorized as either excessive qi or vacuous qi. Acute pain is usually from excessive qi getting caught in different parts of the body and not moving.  Chronic pain is usually from vacuous qi. There is just not enough to keep everything moving and it stops flowing.