I have had this allergy for three years and a month ago I found out why I get it, it’s the food additive 635. My hands burn, then I get a rash all over, very big welts that itch sometimes. I have swollen lips, even had it in the throat, on the ears, in the hair everywhere, what can I do about it.  Thanks for letting us know all about 635 I have been worried what has caused it. Thank you – Ruby by email.