For the exopathic cause of allergic purport , traditional chinese medical expathogen sums op wind , hot , weak , blood stasis etc , and the wind is the main reason to cause the disease , in the meantime with qi and blood , the turbulence of the five zang-organs it also has a direct relation .

对于过敏性紫疾的外因，祖国传统医学总结为风、热、虚，瘀等因素，而风邪致病是其主要原因，同时与气血，五脏功能紊乱也有直接关系。