Hello Thanks for writing to H.C.M. for your query. I have gone through your query regarding weight gain after removal of tonsils and adenoids as this may damage to thyroid. For above matter I would like to tell you that Tonsil and adnoids surgery is not connected to thyroid functions at all. Tonsils and adenoids are having blood supply from different arterial branch and thyroid gland is supplied by different arterial branch therefore no quistion arises for damage to thyroid due to adenotonsillectomy. It has been observed that a child of chronic adenotonsillitis becomes sick due to recurrent throat infections from time to time sometimes this frequency is quite high, in such cases due to recurrent illness and difficulty in swallowing during illness child lands on bad health and sometimes child becomes underweight. in such cases after operation disease factor gets finished and gradually child s health improves, and this happens because of cure of disease not due to disturbence of thyroid. I hope now your query is explained well. Regards.