Spinal epidural hematoma can occur after spinal surgery, with the majority of cases developing within 24 hours. However, it is possible for the hematoma to occur up to two weeks after surgery, and even one year in rare cases. Symptoms typically present within 24 hours, but can sometimes take up to 80 hours to appear. Treatment should not be delayed beyond 12 hours, as spontaneous recovery may occur. In some cases, conservative treatment may be appropriate. The average time interval from symptom onset to surgery is 23.4 hours.