Diseases
allergy
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
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.
Symptoms
- hay fever: sneezing, runny, stuffy nose, and itching.
- food allergy: tingling in the mouth, swelling of the lips, or anaphylaxis.
- insect sting allergy: swelling, itching, cough, chest tightness, or anaphylaxis.
- drug allergy: itchy skin, rash, facial swelling, wheezing, or anaphylaxis.
- anaphylaxis: a life-threatening medical emergency,loss of consciousness.
Causes
- airborne allergens
- certain foods.
- insect stings, or medications.
Risk factors
- have a family history of asthma or allergies.
- being a child
- have asthma or another allergic condition
Diagnosis
- skin test.
- blood test.
Medicines used
Frequently asked questions
What is allergy?
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.
What are the symptoms of allergy?
hay fever: sneezing, runny, stuffy nose, and itching., food allergy: tingling in the mouth, swelling of the lips, or anaphylaxis., insect sting allergy: swelling, itching, cough, chest tightness, or anaphylaxis., drug allergy: itchy skin, rash, facial swelling, wheezing, or anaphylaxis., anaphylaxis: a life-threatening medical emergency,loss of consciousness.
What causes allergy?
airborne allergens; certain foods.; insect stings, or medications.
Which medicines are used for allergy?
acrivastine
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