Hi, I am an 18 year old student. For some time now (4/5 years that I can remember) I can become red in the face. Usually in some sort of awkward situation, but many times there is no need for me to go red for example.

A presentation (school / college)
while I stand up in front of my peers I almost certainly will go red, I have had many ways of hiding this like; coughing excessively like i’m choking, sitting down until it has come and gone (often causes awkwardness) or trying to put the attention else where. I know few people have this, but I feel my situation is slightly different.

Talking to people in general, if i'm at all put in the spot light I tend to go red in the face, again using some sort of distraction to put the attention away.

I have also had it in general conversations with my mum or dad, for no reason at all I will just go red in the face, I feel hot in the face, then it goes away, it wont usually come back in the same conversation / what ever i’m doing.

Talking to girls, while I generally have no problem talking to girls, I still tend to go red in the face on occasions, when I really shouldn’t. I will just go red in perfectly normal talking situations.

I can give more examples / situations if needed to clarify with anything.

Why am I asking about this now?

Well, I generally have been able to dodge these situations, but i’m at university now and I will have to stand up and do a presentation and in the current state i'm in there is no way I wont be able to do this with out cracking up and making my self look like some weird fool.

It really does make me nervous and i’m very self conscious of it.
I believe it’s more then just a reaction to some sort of embarrassment, or if it is that, more of an extreme case.

Anyway, I hope someone here knows of this sort of "hot flush" and has a possible answer.
Thanks for any help given.