In-depth

Allergy skin tests

Itching, sneezing and swelling: Find out what's causing your allergy symptoms.

Anaphylaxis

Anaphylaxis is the most serious type of allergic reaction. It often occurs rapidly after exposure to an allergen and may be life-threatening.

Dizziness

Dizziness has many possible causes. The cause of dizziness may be simple, or dizziness may be a sign of a more serious disorder.

Hives and angioedema

Hives and angioedema — Comprehensive overview covers symptoms, causes, treatment of these common allergic disorders.

Tachycardia

Tachycardia, a rapid heart rate, is caused by an abnormality in your heart's electrical impulses. Tachycardia can cause serious complications, including sudden cardiac arrest.

Nov. 22, 2014

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