What is allergy in simple words?
An allergy is a chronic condition involving an abnormal reaction to an ordinarily harmless substance called an allergen. Allergens can include aeroallergens such as dust mite, mold, and tree weed and grass pollen, as well as food allergens such as milk, egg, soy, wheat, nut or fish proteins.
What is the meaning of allergy in English?
noun, plural al·ler·gies.
an abnormal reaction of the body to a previously encountered allergen introduced by inhalation, ingestion, injection, or skin contact, often manifested by itchy eyes, runny nose, wheezing, skin rash, or diarrhea. hypersensitivity to the reintroduction of an allergen. Compare anaphylaxis.
What does Allegic mean?
Overview. Allergies occur when your immune system reacts to a foreign substance — such as pollen, bee venom or pet dander — or a food that doesn’t cause a reaction in most people. Your immune system produces substances known as antibodies.
What do you mean by allergic reaction?
Allergic Reaction Definition
An allergic reaction occurs when the immune system overreacts to a harmless substance known as an allergen. The immune system protects the body from infections, viruses and diseases.
What is an example of allergy?
grass and tree pollen – an allergy to these is known as hay fever (allergic rhinitis) dust mites. animal dander, tiny flakes of skin or hair. food – particularly nuts, fruit, shellfish, eggs and cows’ milk.
Is allergy a disease?
Allergic disease is one of the most common chronic health conditions in the world. People with a family history of allergies have an increase risk of developing allergic disease. Hay fever (allergic rhinitis), eczema, hives, asthma, and food allergy are some types of allergic diseases.
What part of speech is allergy?
adjective. of or relating to allergy: an allergic reaction to wool.
Do allergies mean weak immune system?
Are allergies a sign of a weak immune system? God, no. If anything, it’s the opposite. Allergies are caused by your immune system responding too strongly to something innocuous.
Can Allergies Be Cured?
No, but you can treat and control your symptoms. You’ll need to do all you can to prevent being exposed to things you’re allergic to — for example, staying inside on days when the pollen count is high, or enclosing your mattress with a dust-mite-proof cover. Allergy medicine can also help.
What are the 10 most common allergies?
A Guide to the Most Common Food Allergies
- Wheat Allergy.
- Tree Nuts.
What are the 4 types of allergic reactions?
Allergists recognize four types of allergic reactions: Type I or anaphylactic reactions, type II or cytotoxic reactions, type III or immunocomplex reactions and type IV or cell-mediated reactions.
What does an allergic reaction look like on skin?
If you have red, bumpy, scaly, itchy or swollen skin, you may have a skin allergy. Urticaria (hives) are red, itchy, raised areas of the skin that can range in size and appear anywhere on your body. Angioedema is a swelling of the deeper layers of the skin that often occurs with hives.
How do I know what I’m allergic to?
Usually your doctor can diagnose allergies based on your symptoms and triggers. If your reactions are more severe or medication doesn’t help, an allergist (a doctor who specializes in treating allergies) may do a skin test to find out what your triggers are.