The burns going up his arm were entirely his own fault. It was embarrassing, to have to go to Hogsmeade Hospital. (Expensive, too.) He thought that someone in the house may have been able to help him — Clementine was actually good at Charms — but he was worried that it would get worse, and then things would cost more, and then he would still end up at Hogsmeade Hospital, only later in the day. So he slunk out of the garden without telling his family. The sense of embarrassment did not abate in the waiting room, nor did it leave him when he was waiting to be joined by a mediwitch.

He smiled at the mediwitch, his best approximation of casual despite the sense of shame. "Cauldron burns," he said simply.