I'm a 19 year old guy, in college, and as far as i know pretty healthy. (except for a broken nose recently) It always happens when i drink water, and i'll feel a ton of heat come over me, then feel feverish and sometimes pinpricks all over me. Its actually painful! Not like having your leg fall asleep either. As far as i can tell most of the reasons dont seem to fit, i'm pretty sure i dont have cancer and i know i dont have HIV, and i'm pretty sure i'm a bit young for andropause. Whats going on? I think i have some kind of blood flow problem because at certain points my limbs will get cold and it feels like blood isnt flowing much, and i get a feeling of shallow consciousness. Of course this happens in separate instances than the hot flashes. What could be wrong?