Here's another one of those made-up modern medical conditions for you to PANIC about.
Apparently, there's something called EMAIL APNEA . . . which happens when you HOLD YOUR BREATH while you type an email. Usually you'd do it because you're so wrapped up in your typing you forget to breathe normally.
If you do inadvertently hold your breath while you type, it can have the same effect as hyperventilating or when you feel like you're in danger, and trigger your sympathetic nervous system.
That can cause your pupils to dilate, increase your heart rate, make you feel light headed, and even make you start FLOP SWEATING. So breathe when you type.
Email apnea is NOT recognized by any official medical boards or organizations.