Posttonsillectomy hemorrhage: posttonsillectomy hemorrhage (PTH) was observed in 19 (19.4%) patients. Of these 19 patients, one (5.3%) had primary hemorrhage and 18 (94.7%) had secondary hemorrhage. All PTH episodes occurred within 12 days after tonsillectomy. PTH episodes occurred most frequently on postoperative days 7 (5 patients) and 6 (4 patients). Category III PTH (reoperation under general anesthesia) was observed in three patients. Therefore, the overall risk of reoperation was 3.1% (3/98).