The common characteristic of wet evil cold evil is that both are Yin evil, are able to damage yang qi, blocking qi and blood running, affecting fluid transmission. Damage to yang: cold evil outside can damage Wei Yang (in the muscle surface of the yang), inside can be directly in the (external evil through the muscle surface of the direct violation of the internal organs) internal organs, damage to the internal organs of the yang; dampness can be trapped in the Qing Yang, damage to the spleen yang. Blockage of qi and blood: cold evil has to collect and attract, the characteristics of condensation, cold damage to yang qi, can lead to yang qi power to promote qi and blood to affect the operation of qi and blood, the meridians to collect and attract, can lead to stagnation of qi and blood; dampness evil viscous stagnation, easy to stagnate with the internal organs and meridians, impede the operation of qi. Influence the distribution of fluids: cold damage to Yang Qi, affecting the spleen, kidneys, etc. on the transmission of fluids gasification; dampness is easy to injure the spleen and soil, resulting in water and dampness within the stop (water and dampness stays in the body), fluids do not cloth. If you feel unwell, you need to consult a Chinese medicine practitioner in time and use the right medication according to the evidence, do not blindly use medication on your own to avoid delaying your condition.