DS 3 forgetting to breathe / holding breath then let's out big sigh

[Flowerpup]

Just that really? When he's concentrating mainly. Is this normal? Do any of your children do it?

I know that I do it! I once almost fainted at work doing a very complicated procedure when I completely forgot to breathe.

I do it too!

I used to hold my breath until I actually passed out when I was a child. My mum had to blow in my face to get me to start breathing again. Bit scary for her, but I grew out of it!

I do it as well! When I'm stressed or overwhelmed usually - I just sort of forget to breath.... Luckily I've always remembered to start again in the nick of time :)

dd did the opposite and hyperventilated

very reassuring for both of us when a paramedic told her one day that you can't actually come to any harm because the moment you pass out you will start breathing normally