I have been diagnosed with irritable bowel syndrome which I have lived with throughout my life. I am 57 years old, female, caucasian. Recently, I have been feeling nauseated just before i have a bowel movement. I don t actually vomit, but a huge saliva increase occurs, I become cold, uncomfortable, and seem to have a normal excrement. No visible blood etc. I am concerned, because I feel sick during this time, and perhaps half an hour afterwards.