My daughter had so many strep throat and tonsillitis infections by age 8 that she went through the maximum antibiotics each year, took different kinds of antibiotics, and ultimately needed penicillin shots directly into her thighs in the ER. Then one week she got tonsillitis and strep again, was taking the antibiotics exactly as prescribed, but three days later came down with double ear infections and conjunctivitis (pink eye) and pneumonia.
The next day, after being seen in the ER and prescribed a stronger antibiotic, her tonsils hemorrhaged. Yes, that was as weird and scary as it sounds. We rushed her to the ER, and the doctor actually brought some other medical staff in to observe her, as he said most medical personnel will rarely see hemorrhagic tonsillitis.
After intensive IV antibiotics for several days (necessary because of the amount of infection present - surgery could possibly have caused some kind of sepsis or something - I forget the actual medical term), her tonsils and adenoids were removed.
Since then, she has had no strep, no bronchitis, no upper respiratory infections (she was getting a lot of those too). We are very glad those tonsils are gone.
Funny side note: she's very witty. When the doctor politely asked her if he could bring in a couple of residents to see hemorrhagic tonsillitis, she said "sure, but it will cost them each a quarter". They all very obligingly contributed with a laugh, pretty amazed that this little kid still had her sense of humor despite being so sick. She held her hand out and they each deposited a quarter or a couple of dimes or loose change in her hand and then she'd patiently open her mouth up wide.