Sorry to piggyback, but I am new to Crohn's and have so many questions. I know I used to have night sweats and I am a 39 y/o female so I thought maybe they were hot flashes and I may be going through menopause, but now I know it was from the Crohn's. Does anyone know why flare ups happen? I can't say I vomit, but I do get nauseous and have some bleeding during bowel movements. And it is crazy how AdamJC said he feels lethargic because I have felt like that before as well. I though I was just really exhausted. Also I have had hair loss.