Aim: Tonsillectomy is one of the most common surgical procedures performed by otolaryngologists. Post tonsillectomy hemorrhage (PTH) is still common and serious complications of tonsillectomy. The aim of this study was to evaluate the clinical characteristics of patients who were admitted due to the PTH. Material and Method: We reviewed the records of 367 patients who underwent tonsillectomy in Kilis State Hospital between January 2012 and September 2016. Of 367 patients undergoing tonsillectomy, 19 (5.2%) developed secondary hemorrhage. All patients were evaluated for age, gender, method of tonsillectomy, bleeding etiology, time of hemorrhage, relationship with the seasons and interventions applied. Results: There was no primary hemorrhage, 19 patients were admitted with secondary hemorrhage. In 19 patients who had secondary hemorrhage, 10 patients (52.6%) were male, 9 (47.4%) patients were female and mean age was 11.15 (4-33 years). PTH occurred in 4 (8%) of 50 adult patients and 15 (4.7%) of 317 children patients. Patients were operated with cold knife tonsillectomy method by the same surgeon. Secondary hemorrhage was recorded most frequently on postoperative day 7 in 6 (31.6%) patients. PTH was observed mainly in autumn (42.1%) and spring (26.3%) seasons. The cause of hemorrhage could only be demonstrated in six child patients (tonsil bed infection in one patient, hard and sharp food consumption in four patients, acidic beverage consumption in one patient). Hemorrhage was controlled in 15 (78.9%) patients using conservative methods. In 4 (21.1%) patients hemorrhage was taken under control in the operating room under general anesthesia. Conclusion: PTH may become life-threatening and all patients with hemorrhage needed close follow up. PTH rates can be higher during autumn season. Physicians should give advice particularly to children about post-operative diet and this may reduce the PTH rates.