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Allergy symptoms

Allergic rhinitis

Recognizing invader

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Recognizing invader

An allergy occurs when the immune system reacts to substances (allergens) that are generally harmless and in most people do not cause an immune response. Antibodies are formed by the immune system in response to the presence of an antigen such as pollen, mold, dust or dander.

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Definition Alternative Names Causes, incidence, and risk factors Symptoms Signs and tests Treatment Expectations (prognosis) Complications Calling your health care provider Prevention References

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Centers

·As a Disease/Condition

Nasal Allergies

·As a Symptom

Acute Upper Respiratory Infection (URI)

German Measles (Rubella)

Rhinitis (Runny Nose)

Severe Acute Respiratory Syndrome (SARS)

Sinusitis

Whooping Cough

·As a Cause

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