Hello! i would like to have a complete history of your child including the duration of each episode and the frequency of these febrile episodes in a year. If the episodes makes him skip the school and he is febrile with high grade fever for more than 3 times a year,he needs tonsillectomy i.e, removal of tonsills that are basically defensive in cases of infection but gets hyper-active in certain individuals,that needs removal. Every surgical procedure has some complications but as such there are no major complications if performed by an expert person with trained staff. Its a day time procedure and patient is usually doscharged after 24 hrs with complete recovery seen in 1 week.