There are several theories about why some kids may be putting on pounds.
One is that when children have enlarged tonsils, they're spending more energy (calories) to breathe. Once they're removed, breathing is easier and uses less calories, Jeyakumar explained.
Another is that when tonsils are big and swallowing is difficult, children may limit the foods they eat or have less of an appetite. After the surgery, kids typically feel better and food probably tastes better, too.