Report Ramen Noodles = Hives Today. What Could Cause This? in Dysautonomia Discussion Posted February 23, 2010 I've been allergic to MSG since I was a kid. I have no other food allergies, but occasionally I can have reactions to other preservatives in hard core amounts. I get the hives and will get mouth and tongue numbness and tingling. I am a big fan of reading labels. Generally the "hidden" MSG (the stuff that isn't on the label) isn't in high enough amounts to cause a reaction. However, I would be careful about anything canned or frozen. Also, many sauces have it, including the barbecue sauce at applebee's (or something like it). I have always wondered how you all drink bullion, because everything but the ground meat paste (YUCK!) has lots of MSG. MSG is a fairly common allergy in my understanding and it has also been recently linked with weight gain.