- 10 Common Allergy Triggers
- Take the Quiz on Allergies
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- Patient Comments: Anaphylaxis - Describe Your Experience
- Patient Comments: Anaphylaxis - Symptoms and Signs
- Patient Comments: Anaphylaxis - Possible Causes
- Patient Comments: Anaphylaxis - Diagnosis
- Patient Comments: Anaphylaxis - Prevention
- Find a local Doctor in your town
- Anaphylaxis facts
- What is anaphylaxis?
- What is the history of anaphylaxis?
- What are common causes of anaphylaxis?
- What are anaphylaxis symptoms and signs?
- Are there any disorders that appear similar to anaphylaxis?
- How is anaphylaxis diagnosed?
- Recommendations after an initial episode of anaphylaxis
- What are emergency measures used in the treatment of anaphylaxis?
- What is the treatment for anaphylaxis?
- Is it possible to prevent anaphylaxis?
- What is the prognosis of anaphylaxis?
Quick Guide10 Common Allergy Causes
What are anaphylaxis symptoms and signs?
Anaphylaxis often affects two or more body systems, or it may present with just low blood pressure (hypotension), which usually occurs with a severe reaction. Although the symptoms of an anaphylactic reaction usually occur within seconds to minutes after exposure to a trigger, some reactions can occur up to two hours after the exposure. Possible symptoms and signs of an anaphylactic reaction include:
Skin symptoms: itching, flushing, hives, and swelling (angioedema)
Additionally, those affected often report a "feeling of impending doom."
There is no testing to predict the severity of an anaphylactic reaction, though a previous severe reaction raises the risk of a subsequent severe reaction. Uncontrolled asthma is a consistent risk factor for severe anaphylaxis and fatal anaphylaxis. A history of environmental allergies, eczema (atopic dermatitis), or asthma may also raise the risk of anaphylaxis.