You should not eat cauliflower if you are allergic to it or if you have an intolerance to it. Additionally, if you have any medical conditions that cauliflower may exacerbate, you should consult with a physician before consuming it. Finally, as with any food, if it doesn't look or smell right, don't eat it.you should not eat cauliflower if you are allergic to it. If you have never eaten it before, you should try a small amount to see if you have a reaction. You should also avoid eating cauliflower if you have an upset stomach.