I've never had it done, but the Wikipedia article has this to say about recovery :
Quote:
Tonsillectomy in adults is perhaps more painful than in children, though everyone's experience is different. Post-operative recovery may take 10-20 days, during which narcotic analgesics are typically prescribed. A diet of soft food (e.g. pudding, eggs, soft noodles, soup, etc.) is recommended to minimize pain and the risk of bleeding; the duration of diet restriction varies from patient to patient and may last from several days to two weeks or more. Proper hydration is also very important during this time, since dehydration can increase throat pain, leading to a vicious cycle of poor fluid intake. At some point, most commonly 7-11 days after the surgery (but occasionally as long as two weeks after), bleeding may occur when scabs begin sloughing off from the surgical sites. The overall risk of bleeding is approximately 1-2% higher in adults. Approximately 10% of adult patients develop significant bleeding at this time. The bleeding may quickly stop naturally, or via mild intervention (e.g. gargling cold water). Otherwise, a surgeon must repair the bleeding immediately by cauterization, which presents all the risks associated with emergency surgery (most having to do with the administration of anesthesia on a patient whose stomach is not empty). There are several different procedures available to remove tonsils, each with different advantages and disadvantages. In children and teenagers it may be the case that there is a noticeable change in voice after the operation.