An allergy is an exacerbated reaction of the immune system to something that doesn’t bother or harm most people. Throughout the body, there are defenses in charge of protecting the organism against certain threats.
Basic points about allergies:
– It is common for a person allergic to one substance to be allergic to many others.
– No one is born with allergies. They develop after the body has become familiar with its surroundings.
Immediate:
It usually occurs within an hour of exposure to the material that caused the allergy. You may have mild symptoms such as itching and reddening of the skin.
Retarded:
It occurs more than an hour after exposure to the substance in question, as with allergies caused by contact with the skin or mucous membranes.