I couldn't breathe well enough to fall asleep' When tiny pollen or mold particles are released from trees, weeds, and grasses, their mission is to fertilize other plants. Most of these particles, however, don't make it to their destination. Instead, they enter unsuspecting noses and throats. The IgE molecules fight the offending allergen by attaching themselves to the body's tissues and blood cells, causing the cells to release inflammatory chemicals into the bloodstream. Some of these chemicals are histamine, leukotrienes and prostaglandins, and they're what cause allergy symptoms.
Researchers think that the tendency to develop allergies is genetic.
People with allergies seem to produce more IgE than those who don't have allergies. Now my son has inherited my problems with allergies. Most are allergic to a combination of pollen, dust or animals. Food allergies can happen very quickly. Saff said that in some cases, the mere aroma of an offending food allergen can cause blood pressure to plummet, sending the allergic person into shock.