出血热小结与题目
Systemic microvascular endothelial edema, degeneration and necrosis are the basic pathologic changes in EHF.
1.Febrile stage (<7天)
Fever accompanied with systemic toxic symptomsSo-called three pains: Headache: because of cerebral vascular dilatation  Lumbago: due to perirenal congestion, edema and            retroperitoneal edema .  Orbital pain: because of edema of orbit tissue