BACKGROUND: The most common cause of obstructive sleep apnoea among children are adenoid and tonsillar hypertrophy. Obstructive sleep apnoea is the most common indication for adenotonsillectomy among children. OBJECTIVES: 1) To evaluate the effects of, adenotonsillectomy on children who have obstructive symptoms due to adenotonsillar hypertrophy. 2) To evaluate quality of life using questionnaire. METHODS AND METHODOLOGY: 106 children aged between 5 to 14 years who have obstructive symptoms due to adenotonsillar hypertrophy are interviewed with obstructive sleep aponea–18 questionnaire before and after surgery, the severity of the symptoms and quality of life were evaluated before and 1 month after surgery. RESULTS: The pre and post–operative mean scores were 69.2 ± 5.15 and 24.8 ± 2.15 respectively (‘p’ value <0.001). CONCLUSION: Patients with adenotonsillar hypertrophy with obstructive symptoms who underwent adenotonsillectomy experienced significant reduction in severity of symptoms post–surgery. The quality of life improved to a large extent in these children post–surgery.