This is our immune system that protects our body from infection. Our body produces a type of proteins which are known as antibodies and these antibodies fight against the germs that cause some infection. There are many kinds of anti-bodies and some of them that cause some allergic reaction are known as IgE.
It is considered that IgE antibodies form in response to those infections that are caused by parasites. It is not yet known why, but some other things like pollen or some foods also make IgE in some people that give rise to allergies.
The IgE serves like a label that sticks to molecules in pollen or food known as allergens. The IgE sticks to the allergens and starts an allergic reaction whenever someone with allergy takes this problem food. The release of histamine is one of the usual effects that IgE stimulates and this release of histamine brings changes in our bodies as symptoms like wheezing or nettle rash.
