My fiance frequently wakes up choking violently. It lasts sometimes a minute
or two, but it feels like forever. It is very scary, he has never seen a doctor, and says it has happened since he was a kid. Sometimes it starts to choke him, and then stops, but usually once it starts, he is struggling for a while just to take a breath. He's left feeling exhausted with a soar throat. What on earth could cause this and what needs to be done about it?