<prompt> Reactionary haemorrhage occurs within:24 hours1-2 Days2 - 7 daysAfter 7 days  <response>: 24 hours: Ref: 60-LB 19-B L 25thPrimary haemorrhage: - Occurs at the time of injury or operationReactionary haemorrhage: - may follow primary haemorrhage within 24 hours usually 4-6 hours and is mainly due to rolling slipping of a ligature, dislodgement of a clot or cessation of reflex vasospasmSecondary haemorrhage: - occurs after 7-14 days and is due to infection and sloughing of part of the wall of an artery. 