Hives can happen in any area of your skin from the head to the toes. Humans have sinuses, or sewers, inside of their heads. If a sinus drain is plugged, you can get a sinus headache which feels like a lot of pressure pushing out from inside your forehead or your face. Sinusitis means inflammation in the sinuses. Food Allergy is an allergic reaction to something that is eaten.
Any food can cause allergy.
Mast Cells are cells inside the human body that line all of the surfaces of the skin, mouth, nose, sinuses, lungs and intestines. Mast cells have histamine inside of them. Everyone has mast cells, but not everyone has the allergy fuses to make the bombs go off. Histamine causes itching, sneezing, swelling and a flood of mucus in the nose, itching, burning and swelling in the skin, headaches and plugging up of the sinuses, spasms and wheezing in the lungs, and also, cramps and diarrhea in the stomach. Antihistamine blocks the bad effects of histamine.