Qi reversion syndrome refers to symptoms of disorder of qi to ascend and descend, or excessive ascent. This syndrome is usually caused by exogenous pathogenic factors, or phlegm, retention of food, retention of cold fluid, or emotional upsets which lead to upward reversion of pulmonary and gastric qi as well as excessive ascent of liver qi.

Clinical manifestations:
Cough and asthmatic breath in upward reversion of pulmonary qi; hiccup, belching, nausea and vomiting in upward reversion of gastric qi; headache, dizziness, even coma and hematemesis in upward reversion of liver qi.

Analysis of symptoms:
Cough and asthmatic breath are due to invasion of exogenous pathogenic factors, or accumulation of phlegm which drive the pulmonary qi to flow adversely upwards~ hiccup, belching, nausea and vomiting are due to invasion of exogenous pathogenic factors, or retention of food and retention of phlegm and fluid in the stomach which prevents the gastric qi from descending and drives it to flow adversely upwards；headache, dizziness and even coma are due to emotional upsets and impairment of the liver by rage which prevent the liver qi from free dispersing and drives it to ascend excessively, making stagnant qi transform into fire which moves up to disturb the head and eyes along the meridians; hematemesis is due to upward flow of blood with adverse running of qi and impairment of yang collaterals.

Key points for syndrome differentiation:
Upward adverse flow of lung, stomach and liver qi.