The mechanism of pain in Chinese medicine is obstruction. It means qi and blood obstruct or go adverse under the influence of many factors. It lead to pain in organs or main and collateral channels.
There are three main factors to cause pain. They are internal cause, external cause and neither internal cause nor external cause.
The properties of pain have two kinds which are cold and hot. Cold is tight which lead to tight pain in collateral channels. Hot pain often lead to red and swell.
Pain also have some difference in qi and blood, deficiency and excess.
As to the specialty of pain, it can divided into stabbing pain, cut pain, distend pain, dull pain and so on.
