Health topics

Allergies

Explore conditions linked to allergic reactions and conditions that can have an allergic component.

Overview

About allergies

Allergy involves an immune response to a normally harmless substance. Symptoms and affected organs differ widely: for example, allergic contact dermatitis affects the skin, while some forms of aspergillosis involve an allergic reaction in the airways. A diagnosis should distinguish these conditions from infections and other causes of similar symptoms.

Skin reactions

1 reference

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Dermatitis

Explore symptoms, diagnosis, care and cited clinical information in the full condition article.

Allergy-related respiratory conditions

1 reference

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Aspergillosis

Condition→AspergillosisAllergic, chronic, fungal-ball and invasive Aspergillus disease with risk-based diagnosis and subtype-specific treatment.

For diagnosis, treatment information and clinical sources, see the individual condition references. This page is a topical directory, not a clinical care guide.