How To Treat Swelling Of Throat And Breathlessness Caused Due To Food Allergy?

Ok my question is this I was diagnosed years ago as being allergic to iodine butit wasn t the dye used in ct scans I had ate some chicken that was fried in fish oil at a local restaurant and my throat swelled up I couldn t breathe and the doctor said they lost me in the emergency room for three minutes is it actually the iodine or the mercury level because I can eat all the shrimp I want to