Hi, i got some food alergy from Thanksgiving dinner, i had crab for the fisrt time in my life so i belive it is from that. I had itch on my stomach, head and back. i took some claritidin and it help me with the itchy skin, but now i had some red spots coming out on my stomach and ribs area. They are big areas not like dots .I have one little spot that is little bit swallen. I don't scratch my body they just come out at night. I don't know what to do.