Objective To study the TCM pattern distribution of allergic purpura（AP）in children.Methods A retrospective study was used to collect the clinical data in 1 228AP children and the TCM pattern distribution was analyzed.The general information

seasonal incidence

predisposing factors

duration

type of disease and laboratory parameters were compared in children with various patterns.Results There were 846cases（68.9%）of bleeding due to blood-heat pattern

362cases（29.5%）of wind-heat damaging collaterals pattern

13cases（1.1%）of qi-yin deficiency pattern and 7cases（0.5%）of yindeficiency fire-hyperactivity pattern.There were 1125（91.6%）3+-to-14-year-old children

853cases（69.5%）were onset in winter or spring

322cases（26.2%）were induced by upper respiratory tract infection

111cases（90.5%）within 4-week duration

591cases（48.1%）with increased platelet count and 403cases（32.8%）with elevated plasma fibrinogen.There was no significant difference between various patterns in the gender distribution or in the distribution of levels of white blood cells（P>0.05）.There were significant differences between various patterns in the distributions of age

seasonal incidence

predisposing factors

clinical types

duration

and levels of platelets

fibrinogen and D-2dimer（P<0.05）.Conclusion The common TCM patterns of AP in children are bleeding due to blood-heat pattern and wind-heat damaging collaterals pattern.The male and female incidence of AP is same.AP is mainly occurred in spring or winter within 4-week duration

mainly induced by respiratory tract infection with a hypercoagulable performance.