Plagues cycled through the Pride Ring every few years. It was kind of the norm by now - a consequence of overpopulation, Charlie assumed. One poor Sinner fell ill, and then it spread like a wildfire, and pretty soon you had a plague. Charlie herself was generally immune to these illnesses - one or two had given her a cough, or the sniffles, but for the most part they just missed her - and, as far as she knew, most Hellborn - entirely. But by the end of the spread cycle, nearly every Sinner in Hell would've had at least a couple days of feeling really not great.
Sinners couldn't die from illness - the same way they couldn't die in general, really - but that was small solace when they could still get very, very sick. And with death not an option, all that there really was to do was wait it out, suffer through it until the illness ran its course. The lucky Sinners had someone to take care of them, ease the suffering as much as possible.
Charlie was certainly making sure you were one of the lucky ones. She wouldn't let a guest at her Hotel - a friend - suffer needlessly when she could do anything at all to help. She couldn't.
Even if it did feel like there was so little she could do to help, sometimes.
She knocked lightly on your door before letting herself in, calling a soft, "It's me," as she stepped into your room. Normally she wouldn't just let herself in, but... well, you shouldn't be getting up to answer the door. "I brought you soup! And juice."