In-depth

Symptoms

Abdominal pain

Find out what causes different types of abdominal pain.

Anaphylaxis

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

Hives and angioedema

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

Nausea and vomiting

Sick to your stomach? Nausea and vomiting usually pass quickly but sometimes result from long-term or serious conditions.

Runny nose

Runny nose: What's causing your sniffles?

Watery eyes

Tearing that goes beyond a happy or sad moment can stem from a variety of causes, from hay fever to more serious conditions.

Tests and diagnosis

Allergy skin tests

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

Aug. 11, 2011

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