Today I accidentally ingested something that I’m mildly allergic to, and within minutes I had hives on my shoulders and scalp (which is my usual reaction).
I understand that hives are caused by your immune system being activated. What I don’t understand is: if you’ve just ingested the food you’re allergic to, how is it that your immune system gets activated before you’ve had any time to digest it? And why do hives appear on the scalp, which is far away from where the food would be absorbed?
In: Biology
People with allergies have heightened immune response to these allergens that can be activated with the smallest of triggers… be it smell, taste or touch… That is why asthmatics have instantaneous reactions to dust or wierd smells… Same happens to allergic food that is ingested… Also this immune reaction occurs in the blood, and so all the effects pertaining to this reaction can occur wherever the blood flows! Be it scalp, lungs, hands, legs.
Latest Answers