I ate a very ripe banana yesterday and immediately afterward I developed a very itchy throat & tongue. Today my throat is red raw, swollen, very sore and covered in small blisters.  I also had a rash where ECG pads were attached for a 24 hour period. I also get a rash from metal jewelery am allergic to Penicillin & bee stings. Is there an underlying allergy linking these things?
Dear. Allergy can be caused by anything that your body doesn't accept. It's common that previously some things were acceptable but now suddenly acceptance is denied. I had read a case somewhere where the pt. developed allergy to telephone instruments plastic, cool breeze, smell of some fabrics, latex of bathroom sleepers... What can you do? Can you avoid everything? Catch is try to enhance your immunity by natural means. Yes that's the only escape or one will end up trying unlimited anti allergic or avoiding Hun Chat Doctor.  Allergy tests are only indicative. Practically can't cover full range of allergens. For banana, well it can be allergy. There is one antidote prescribed in Ayurveda. Chew and suck cardamomum seeds. It's not going to harm you. At the most it won't effect you. That's all. Your option to try anti-allergic toxic 