Wind-cold-dampness arthralgia is caused by exogenous pathogenic factors such as wind, cold and dampness invading meridians and blocking qi and blood.

1. Deficiency of vital qi is the internal factor of arthralgia syndrome and the basis of pathological changes. Physical deficiency, lack of health, and instability of camps and guards all create conditions for feeling evil. Therefore, The Theory of Disease Syndrome, Wind Disease and Rheumatalgia says, "Blood deficiency leads to rheumatism." "Fang Jisheng Bi" also said: "All due to physical weakness, lack of spirit, cold and dampness." Lack of healthy qi, inability to drive away evil spirits, and lingering disease and evil spirits.

2. Exogenous common cold, cold and dampness are mostly caused by wet life, wading in the rain, sleeping in the wind or fog, climate change, alternating cold and heat, etc. , so that pathogenic wind, cold and dampness invade the human body. As Su Wen's "Bi Lun" said: "Wind, cold and dampness are mixed to form Bi.

The evils of wind, cold and dampness often abuse each other and become diseases. Wind is the development mechanism of yang evil, and it also has penetrating power. Cold uses this force to commit internal crimes, and wind uses cold-coagulated products to attach evil to the diseased position, which becomes the basis of hurting people and causing diseases. Damp pathogen invades bones and muscles through the divergent force of common cold and the absorbed energy of cold pathogen, while cold pathogen and damp pathogen stick to limbs instead of leaving.

The basic pathogenesis of this disease is that the pathogenic factors of wind, cold and dampness remain in muscles, bones and joints, which leads to the obstruction of meridians, the obstruction of qi and blood, the obstruction of limbs and meridians and malnutrition. However, the pathogenic factors of wind, cold and dampness are different, and each has its own emphasis. The common cold is even worse, the evil spirits wander and the lesions are uncertain; If the cold pathogen is very serious, it will kill the yang and cause severe pain; If the damp pathogen is very serious, it will adhere and solidify, and the lesion will remain calm.

The arthralgia syndrome is caused by prolonged treatment, aggravation of qi, blood and body fluid diseases, blood stasis, body fluid condensation, phlegm and blood stasis, obstruction of meridians, deep epiphysis, skin ecchymosis, joint swelling and deformity, and even deep into viscera.

The initial illness is true, and a long illness will consume healthy qi, which is mixed with excess and deficiency, accompanied by deficiency of both qi and blood and deficiency of liver and kidney.