What is an allergy simple definition?

What is an allergy simple definition?

The definition of allergy Allergy occurs when a person reacts to substances in the environment that are harmless to most people. These substances are known as allergens and are found in dust mites, pets, pollen, insects, ticks, moulds, foods and some medications.

What is the medical definition of allergy?

An allergy is a reaction by your immune system to something that does not bother most other people. People who have allergies often are sensitive to more than one thing. Substances that often cause reactions are. Pollen. Dust mites.

What are allergies?

An allergy is an immune system response to a foreign substance that’s not typically harmful to your body. These foreign substances are called allergens. They can include certain foods, pollen, or pet dander. Your immune system’s job is to keep you healthy by fighting harmful pathogens.

What does Allegy mean?

/ˈæl.ɚ.dʒi/ a condition that makes a person become sick or develop skin or breathing problems because they have eaten certain foods or been near certain substances: an allergy to wheat. a wheat allergy.

What is allergy in one word?

/ (ˈælədʒɪ) / noun plural -gies. a hypersensitivity to a substance that causes the body to react to any contact with that substance. Hay fever is an allergic reaction to pollen. informal aversionhe has an allergy to studying.

What are the signs and symptoms of allergy?

Main allergy symptoms

• sneezing and an itchy, runny or blocked nose (allergic rhinitis)
• itchy, red, watering eyes (conjunctivitis)
• wheezing, chest tightness, shortness of breath and a cough.
• a raised, itchy, red rash (hives)
• swollen lips, tongue, eyes or face.
• tummy pain, feeling sick, vomiting or diarrhoea.

What are allergies give an example?

Common allergy triggers include: Airborne allergens, such as pollen, animal dander, dust mites and mold. Certain foods, particularly peanuts, tree nuts, wheat, soy, fish, shellfish, eggs and milk. Insect stings, such as from a bee or wasp.

What is allergy medicine called?

Over-the-counter:Cetirizine (Zyrtec), fexofenadine (Allegra), levocetirizine (Xyzal), and loratadine (Alavert, Claritin) are taken by mouth. Brompheniramine (Dimetapp allergy, Nasahist B), chlorpheniramine (Chlor-Trimeton), clemastine (Tavist), and diphenhydramine (Benadryl) can make you drowsy.

What can trigger your allergies?

Common allergy triggers include:

• Airborne allergens, such as pollen, animal dander, dust mites and mold.
• Certain foods, particularly peanuts, tree nuts, wheat, soy, fish, shellfish, eggs and milk.
• Insect stings, such as from a bee or wasp.
• Medications, particularly penicillin or penicillin-based antibiotics.

Is everyone allergic to something?

Does everyone get allergies? No. Most allergies are inherited, which means they are passed on to children by their parents. People inherit a tendency to be allergic, although not to any specific allergen.

What is the safest antihistamine?

Loratadine, cetrizine, and fexofenadine all have excellent safety records. Their cardiovascular safety has been demonstrated in drug-interaction studies, elevated-dose studies, and clinical trials. These three antihistamines have also been shown safe in special populations, including pediatric and elderly patients.

What does having allergies mean?

1. variable noun. If you have a particular allergy, you become ill or get a rash when you eat, smell, or touch something that does not normally make people ill. Food allergies can result in an enormous variety of different symptoms. Allergy to cats is one of the commonest causes of asthma.

What are the main causes of allergy?

Causes

• Airborne allergens, such as pollen, animal dander, dust mites and mold.
• Certain foods, particularly peanuts, tree nuts, wheat, soy, fish, shellfish, eggs and milk.
• Insect stings, such as from a bee or wasp.
• Medications, particularly penicillin or penicillin-based antibiotics.

What are allergy examples?

Examples include pollens, dust mite, molds, danders, and certain foods. People prone to allergies are said to be allergic or atopic. Although allergies can develop at any age, the risk of developing allergies is genetic. It is related to ones family history of allergy.

How do you treat allergies?

Allergy treatments include:

1. Allergen avoidance. Your doctor will help you take steps to identify and avoid your allergy triggers.
2. Medications. Depending on your allergy, medications can help reduce your immune system reaction and ease symptoms.
3. Immunotherapy.
4. Emergency epinephrine.

What is the medical dictionary definition of allergies?

Also found in: Dictionary, Thesaurus, Financial, Encyclopedia, Wikipedia. Allergies are abnormal reactions of the immune system that occur in response to otherwise harmless substances. Allergies are among the most common of medical disorders.

Why do some people have an allergy to something?

An allergy refers to a misguided reaction by our immune system in response to bodily contact with certain foreign substances. When these allergens come in contact with the body, it causes the immune system to develop an allergic reaction in people who are allergic to it.

Which is an example of an allergic reaction?

The allergic reaction is misguided in that these foreign substances are usually harmless. The substances that trigger allergy are called allergen. Examples include pollens, dust mite, molds, danders, and certain foods. People prone to allergies are said to be allergic or atopic.

Which is the best synonym for the word allergen?

[al-er-juh n, -jen] See more synonyms for allergen on Thesaurus.com. noun Immunology. any substance, often a protein, that induces an allergy: common allergens include pollen, grasses, dust, and some medications.

What are the symptoms of a serious allergy?

Respiratory symptoms: nasal congestion, runny nose, cough, shortness of breath, chest tightness, and wheezing. Cardiovascular symptoms: dizziness, lightheadedness, fast heart rate ( tachycardia ), and low blood pressure. Additionally, those affected often report a “feeling of impending doom.”.

What are the four types of allergic reactions?

There are four types of allergic (hypersensitivity) reactions based on the mechanism of the reaction. The types I, II, and III allergic reactions are antibody mediated reactions, while type IV is a T-cell mediated reaction.

What medications cause allergies?

Common Drugs That Cause Allergies. Any medication can trigger an allergic reaction. That said, some are more likely to cause these types of problems than others: Antibiotics — amoxicillin (Moxatag), ampicillin, penicillin (Bicillin L-A), tetracycline (Sumycin), and others. Nonsteroidal anti-inflammatory drugs like ibuprofen and naproxen . Aspirin.

What to take for allergies?

Quercetin, grape seed extract and vitamin C are all good sources of allergy relief. You can buy supplements or take them in through the foods you eat. Apples, bananas, onions and red wine all contain allergy-fighting nutrients.