Food alllergy? Hi I have eaten oat biscuit and black pepper and a banana, I am now itchy hair head eye eyebrow?

Maybe. Food allergic reactions have been described with oats as well as other grains. Banana allergy can be associated with latex allergy. Black pepper allergy is fairly uncommon, but spice allergy is likely more common than previously thought as many persons who had reactions just stop eating it and it may not be reported. An allergist can help confirm or rule out the above foods as the trigger.