Itching, sneezing and swelling: Find out what's causing your allergy symptoms.
Anaphylaxis is the most serious type of allergic reaction. It often occurs rapidly after exposure to an allergen and may be life-threatening.
Here's information about common causes of diarrhea and when to see your doctor.
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 — Comprehensive overview covers symptoms, causes, treatment of these common allergic disorders.
Low blood pressure (hypotension) can be a sign of good health or of a life-threatening condition. Find out more about hypotension's causes and treatment options.
Runny nose: What's causing your sniffles?
Shortness of breath can be frightening. Most of the time, a heart or lung condition is the cause.
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.
Jun. 27, 2012
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