Hello, I am 50 years old and just ate some seafood. Specifically, fish, scallops, shrimp, and oysters. Now my face and the roof of my mouth are itchy and numb feeling, I also have a headache. My nose feels numb on one side and that sinus cavity feels full. Could I be allergic to the seafood or did my sinuses just all of a sudden act up ? I can breathe ok my nose just feels swollen or stopped up. My nose is not swollen though.