Y'know working at a hospital isn't all fun and games. Sometimes there's a bug going around, and you catch it (dealing with the sick all day like you do.) Sometimes it's just the sniffles, but sometimes it's the PITS.

No, seriously. Pneumatically Inflating Tail Syndrome, and looks like Nurse Ai has caught it bad! Hope you get better soon!

(Nurse Ai created by  zenywolf