金元四大家之一李杲创立脾胃学说,认为"百病皆由脾胃衰而生",脾胃不足则内生火热之邪,即阴火,是由饮食不节,形体劳役,七情内伤所致,这种阴火内盛的病证称为"热中".后世医家对于热中证及阴火的实质有诸多争议,影响对脾胃学说的进一步理解和运用.根据李杲医著及其他医家论述分析,热中证的实质是由于脾胃内伤,化生风、湿、热、燥邪气,致使经络营卫运行不利而产生;阴火的治疗侧重于培补中气,除热祛邪.%LI Gao, who was one of the four famous doctors in the peoriod of Jin and Yuan in history, founded the Doctrine of Spleen and Stomach. It said that all most every disease is caused by the decline of the functions of spleen and stomach. Weakness of the spleen and stomach caused endogenic fire evil, which was yin fire, resulted from eating and drinking without temperance, physique and body too more labor service and internal injury caused by excess of seven emotions. These kinds of diseases and syndromes from yin fire were named by polyphagia and polymicturition syndrome. Later ages' physicians debated the essence of polyphagia and polymicturition syndrome and yin fire more often, but this disturbed the understanding and applying the Doctrine of Spleen and Stomach. According to LI Gao's medical works and other physicians' expoundations and analyses, this article believed that the essence of polyphagia and polyrnicturition syndrome is internal damage of the spleen and stomach, as wind, wetness, heat and dryness evils following, and yingqi and weiqi in meridians run blocked. Treating yin fire lays particular emphasis on cultivating and strengthening the middle warmer energy, eliminating heat and expelling pathogen.
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