It could just be nerves sensi, Like you say when your asking for a day off things like that

The flushing response can mean a lot of things from exitement(if accompanied by pupil diliation) to fear, yeh I know extrem ends of the spectrum.

A fear of blushing can make you blush more often as you more conscious your gonna blush so you make it happen....If ya get me.

Try taking a few deep breaths and trying not to worry about blushing and it might stop, eh I know its as involuntary as smiling.

Jus trying to help

Peace rips