Before we begin: Anaphylaxis or anaphylactic shock is a serious allergic reaction. It can begin very quickly, and symptoms may be life-threatening. Read the symptoms.
This tutorial walks you through everything you need to know about anaphylaxis. We explain it in plain language, step by step, so whether you are a student, a patient, or simply curious, you will come away with a solid understanding.
We cover what it is, why it matters, how it is diagnosed, and what you can do about it. Key facts are called out along the way.
Anaphylaxis is a serious allergic reaction. It can begin very quickly, and symptoms may be life-threatening. The most common causes are reactions to foods (especially peanuts), medications, and stinging insects. Other causes include exercise and exposure to latex. Sometimes no cause can be found.
It can affect many organs:
Skin - itching, hives, redness, swelling
Nose - sneezing, stuffy nose, runny nose
Mouth - itching, swelling of the lips or tongue
Throat - itching, tightness, trouble swallowing, swelling of the back of the throat
Chest - shortness of breath, coughing, wheezing, chest pain or tightness
Heart - weak pulse, passing out, shock
Gastrointestinal tract - vomiting, diarrhea, cramps
Nervous system - dizziness or fainting
If someone is having a serious allergic reaction, call 911. If an auto-injector is available, give the person the injection right away.
Also known as: Anaphylactic shock.
Categories: Immune System.
Source: National Institutes of Health — National Institute of Allergy and Infectious Diseases.
Key Takeaways
Understanding anaphylaxis is an important part of taking charge of your health. Here is what to remember:
- Know the signs — Recognizing early symptoms can lead to earlier diagnosis and better outcomes.
- Talk to your provider — If you have concerns or a family history of this condition, bring it up at your next checkup.
- Stay informed — Medical knowledge evolves. Keep learning and asking questions.
- You are not alone — Many people deal with this condition. Support groups and educational resources can help.