Wind is one of the six external pathogens and can cause disease along with another external pathogen. Therefore, a given disease may be caused by a combination of two pathogenic energies.

When heat and fire reach their peaks, they may be transformed into internal wind. Blood deficiency with yin exhaustion and energy and blood disturbances may also generate internal wind. The symptoms caused by internal wind include vertigo, fainting, twitching, trembling, numbness, dry mouth, and eyes.

Injurious wind refers to the disease caused by wind, which is normally called the common cold. In clinical practice, there are two types: common cold due to wind and cold, and common cold due to wind and heat. The two types are treated differently.