I thought I read she even measured. If so, and she's swelling up when she's in sleep mode, I'd see a doctor. It's one thing to ask online how to reduce swelling from an injury (swelling is a normal part of that healing process) and another thing all together if random parts of your body swell for no apparent reason.
I'm not trying to be alarmist, but trying to diagnose anything from what is posted online, even at WebMD or the Mayo Clinic website can drive you nuts. Depending on what you're reading, you could end up thinking you're dying or end up thinking it's your imagination or anything in between.
"Right is right, even if no one is doing it; wrong is wrong, even if everyone is doing it." - St. Augustine