The common pathogenic characteristic of dampness and cold is that it is easy to injure yang qi and block qi and blood. 1. easy to hurt Yang: because the cold and dampness are Yin evil, easy to hurt the human body Yang Qi. Regardless of the external and internal cold, can make the human body due to yang damage and loss of normal warming effect, such as external cold invasion of the human body muscle surface, the surface of the body to lose warmth and cold (fear of cold) fear of cold. Wet for Yin evil, easy to hurt Yang Qi, especially easy to damage the spleen Yang, resulting in various types of diseases throughout the body. 2. Blockage of qi and blood: cold stagnation, that is, cold evil can make the human body qi and blood run poorly, the meridians do not pass, can be seen on the lips and nails cyanosis and all kinds of pain. Dampness has the characteristic of stickiness and stagnation, and it is also easy to hinder the normal operation of qi and blood, thus resulting in pain and other uncomfortable symptoms. If symptoms occur, it is recommended to go to the hospital, under the guidance of a physician to standardize the treatment, do not take medication without authorization, so as not to cause adverse reactions.