How freakin' 1872 is that? It sounds like something one of Laura Ingalls Wilder's siblings would've died from.
But huzzah, this is the 21st century and we have all kinds of modern medicine. So Rhys gets to take a three-day course of steroids instead.
Hope it's all out of his system by the time Itty-Bitty Sports Camp starts in a couple weeks. Though it'd probably do wonders for his swing.