The Wei stage is typically the initial stage of many infectious diseases, or Warm Wind diseases. The Warm evil in combination with Wind attacks the surface or exterior of the body (the skin) where the defensive Qi, or Wei Qi, guards the body like an aura. As the Lungs control the Skin and the Wei Qi goes through the Lungs, the symptoms in this Stage are related to the Lungs.
Formula: Yin Qiao San (Honeysuckle and Forsythia Powder)
Function: Disperses Wind-Heat, clears Heat and relieves toxicity.
At this stage, the Warm Evil has progressed into the interior. With the Warm Evil attacking the Zangfu, excessive type symptoms (internal excess heat) will result as there is a confrontation between the Vital Qi, or Zheng Qi of the human body and the pathogenic Warm Evil. Depending one which Zang Fu is attacked, resulting symptoms will vary.
The most commonly affected organs are the Lungs, Stomach, Large Intestine, Gallbladder and the Spleen.
Notes: If the Lungs are attacked, symptoms such as cough with yellow phlegm asthma; chest pain will be present. With heat in the chest irritability will be present. Heat in the Stomach result in profuse sweating, 4Wh fever as well as a strong thirst for cold drink. Heat in Large Intestines result in constipation, abdominal ache and "diarrhea." Tongue coating could be black due to Stomach heat.
Formula: Ma Xing Shi Gan Tang (Ephedra, Apricot Kernel, Gypsum and Licorice Decoction)
Function: Facilitates the flow of Lung Qi, clears Heat, and calms wheezing by directing rebellious Qi downward.
When the Warm Evil pathogen have progressed pass the Qi stage, it enters the Nutritional Qi, or Ying Qi stage. At this stage, the disease has nearly reached the Blood (Xue) stage the deepest level. This stage is very similar to the Xue Fen stage but is slightly less serious. Ying is considered the Qi of Blood and is also the precursor of blood. It circulates through the the blood vessels and through the Heart. The this stage of a Warm Evil invasion, the most symptoms affect the Heart, producing Interior Deficient Heat.
Formula: Qing Ying Tang
Function: Cools Heat, cools Blood, and opens the orifices (clearing the Shen).
At this stage, the Warm Evil has entered into the Blood. As the Heart controls the Blood and the Liver stores the Blood, both organs are affected at this stage. The Kidneys are also involved. A significant symptoms of this stage is bleeding. The bleeding is due to Heat in the Blood; it may occur throughout the body. The skin may bleed, the mouth, nose, anus, etc. This stage is considered the final stage and is usually the terminal stage of a febrile disease. At this stage, people usually die very quickly. Again the symptoms are made up of two types: excess heat symptoms and deficient yin symptoms.
Includes all Ying Level symptoms, plus the following:
Formula: Xi Jiao Di Huang Tang
Function: Clears Heat, cools Blood, extinguishes Internal Wind, and stops the Bleeding.