Allergies: If you have them, you know what happens when they’re triggered. But do you know what sets them off?
Your immune system protects you from bacteria and viruses. Sometimes it misreads a harmless substance as a threat. When that happens, your body creates chemicals, like histamine, that trigger an allergic reaction. It's unclear what causes your immune system to make the mistake about certain things.
You come home after a day away, step into the house, and the symptoms hit: Watery eyes, scratchy throat, congestion. Could it be indoor allergies?
Allergies are very common. An estimated 50 million Americans are allergic to everything from dust and dander, to mold and mites.
But what about you? How can you be sure you have indoor allergies -- and pinpoint what’s causing them? To help you understand what’s behind your allergy symptoms, WebMD got tips from experts on how to recognize common allergy...
Common allergens include dust mites, pet dander, pollen, peanuts, and seafood. Medications, latex, metals such as nickel, chemicals in household cleaning products, and perfumes and dyes found in beauty products can also set off a reaction in some people.
Who Will React?
Allergies affect about 1 in 5 people. Experts don't know why some people react to certain things and others don’t. But having a family history of allergies makes it more likely you’ll get them.
You can develop an allergy at any age. Something that’s never bothered you before may suddenly cause a reaction.
Signs of Trouble
The way your body reacts to an allergen can vary. It could be mild or severe, and might affect different parts of the body.
Common triggers of this severe allergic reaction are insect stings and foods like nuts. A medication such as epinephrine is usually needed to halt this dangerous response. If you have severe allergies, you should carry an epinephrine auto-injector in case you’re exposed.
What to Do
If you think you may have allergies, see a specialist (allergist). There are blood tests that can tell you what you’re allergic to. Knowing that can help you minimize your exposure to the allergen.
Depending on the type of allergy, your doctor will recommend treatment that may include an oral antihistamine, regular allergy shots, or carrying an epinephrine auto-injector with you.