Amenstrualperiodwhichcoversmorethantendaysisprolonged.Theflowmaycontinueinalingeringwayforfifteendaysinseverecases.Thediseaseismainlycausedbystagnationofqiandbloodorinvasionoftheuterusbyexogenouspathogenicfactors.Ineithercase,stagnantbloodblocksthecollate...[繼續閱讀]