Hi...I've never had that experience, but if it's something new, you should call the doctor and get it checked out in case there's something else going on that's not related. I see you're on Nexium...is that for an ulcer or reflux?.
Vomitting can apparently be related to a flare, I guess it would depend on how strong one's reactions are to nausea or peristalsis....etc.
I know when I'm starting to flare and the inflammation is very low in the rectum, I have horrific nausea....I don't have the feeling that I have to vomit when I'm on the toilet, but I do afterward when it feels like my whole insides are doing flips and turns and in total spasm mode.
I sure hope it's nothing other than a symptom that's fleeting.
By chance are you pregnant or expecting your period soon?
Keep us posted as to how you're doing.
*Heather* Status: mild flare enemas tapered to every 3rd night
~diagnosed January 1989 UC (proctosigmoiditis)
~UC meds: Asacol (3 x2 daily); Salofalk enemas nightly for flares & taper to maintenance
~Bentylol (dicyclomine) 20mg as needed; Ranitidine (reflux); Effexor XR 75mg(depression); Pulmicort/Airomir (asthma)
~vitamins/minerals/supplements; Probiotics....(Natural Factors Protec, Primadophilus Reuteri Pearls). @ bedtime
~various digestive enzymes as needed
~URSO for PSC (or PBC) 500mg X 2 daily (LFTs back to NORMAL!!)
My doc's logic.. "TREAT (FROM)BOTH ENDS" worth it !!!