You're makin' me blush

I'm thoroughly convinced I have- Tomato Syndrome.
Or Flushing Tomato Syndrome. Or FTS.
Ok, so it's not exactly a nationally recognized disease. I'm working on it.
So, here is a typical scene.
Person A- Hey Jessica, did you study for the Bio test next hour?
Jessica- Huh?! (freaks out; cheeks turn an unnatural shade of flame red).
Person A- Ha. Just kidding! That's next week.
Jessica- Oh. Phew! (and while she's relieved; her cheeks are not, and they remain the oh-so-attractive hue of Lycopersicon esculentum for most of the rest of the day).