One of the six External Pathogenic Factors. Heat is the same pathogen as Fire, but in a less severe form. Heat, like Fire, has the characteristics of causing Qi and blood to circulate recklessly, moving upward to disturb the mind and spirit. However, Heat does not consume the body fluids as readily as Fire, and Heat cannot generate internal wind. Heat must first transform into Fire, and then Fire can generate internal wind.
The condition or sensation of being hot; opposite of cold.