First off, I just want to say that I'm allergic to cold temperatures and end up with hives if my body feels it is too cold.

I went to the gym today and worked up a good sweat. I know sweat is used for cooling down the body which is cool. I'm fine with that, but apparently my body got a little too cooled down because right after I started sweating, I started getting hives where I was sweating. My whole body was pretty much covered in hives. The ones on my legs were so unbearably itchy that they hurt and I was almost crying on my drive home from the campus gym. 

When I got home, I took a hot shower and the hives disappeared, but even until right now I feel the effects of the drowsiness that comes along with hives.

I'm just kind of frustrated. I want to exercise and work out and be more fit, but if it means getting hives every time I do it, I don't know if my body can handle it. 

That's gotta be crappy.

I can relate to the whole beeing so itchy that it hurts. I suffer from Dermographism, which is a skin condition where anything that brushes up against my skin can make me extremely itchy... and it's made me cry many times!

Oh that's so bad.
I  can't imagine my life without going ti the gym 2 times a week.

I think you should go to the doctor (;

im allergic to exercise too. believe it or not, its a fairly common thing. when i exercise, get upset, or get over heated, my whole body becomes covered in hives. i turn as red as a tomato, and i usually end up passing out. to get rid of it, i take benadryl. unfortunately theres no cure for it, you really just have to know your limits and be able to tell when a rash is coming on. it developed for me at the age of 11 when i first hit puberty.

but hey, it got me out of gym class!

its called cholinergic urticaria. when it first developed, none of my doctors knew what it was. i seriously went to every doctor imaginable and had countless sonograms, blood tests, mris, all kinds of stuff. 

Mine only get that bad every once in a while.

But before I knew what it was it would get REALLY bad! My boyfriend would have to hold me down and I would end up crying from the pain.

Aww gosh thats awful.....i hate anything that stops you being able to do something you want to!

I have now got this stupid Ulcer which is stopping all the things i enjoy...i cant even drink coffee :( my fav thing in the world.

Maybe go to the doctors (i know its expensive) and ask if there is something you can take to stop this