疫疹·正气暴脱证(pestilence with petechiae with syndrome of sudden collapse of vital qi)是指正气暴脱,以身热骤降,面色苍白,气短息微,大汗不止,四肢湿冷,烦乱不安或神昏谵语,癍疹暗晦或突然隐退,或见各种出血,舌淡红,脉微欲绝等为常见症的疫疹证候。