I have had "a turn" every morning for the last few and occasionally wake up in the night with it. when i've gone for a poo, suddenly nothing coming out, massive pains, hot,clammy, faint and nauseous and then don't know which end to point at the loo. usually, i make it to my bed and lie down and it goes in a few minutes. It used to happen to me when i was younger and drank; in those days, i'd often faint and fall off the loo or pass out on my way back to my bed can anyone offer an explanation? is it low blood pressure, or low blood sugar or something? i'd forgotten how frightening it can be as i don't really drink now.