Mezo, I was reading about food poisoning recently...do you think it's possible you could be allergic to some stuff (food/food additives) including MSG?
Allergic symptoms (facial flushing, itching) occur
Less than 1 h
Headache, dizziness, nausea, vomiting, peppery taste, burning of throat, facial swelling and flushing, stomach pain, itching of skin.
Histamine (scombroid) Numbness around mouth, tingling sensation, flushing, dizziness, headache, nausea.
Monosodium glutamate Flushing, sensation of warmth, itching, abdominal pain, puffing of face and knees.
Nicotinic acid www.fda.gov