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Allergic or anaphylactic shock
Signs and Symptoms of Anaphylaxis
An allergic reaction usually occurs within minutes of contact with an allergen, but can also occur several hours after exposure. A reaction can include any of the following symptoms, and a person may have one or more of these symptoms, regardless of the allergen:
- Cutaneous system (skin): hives, swelling, itching, feeling hot, redness, rash
- Respiratory system (breathing): coughing, wheezing, shortness of breath, chest pain or tightness, throat tightness, hoarse voice, nasal congestion or hay fever-like symptoms (runny or itchy nose, watery eyes, sneezing), difficulty swallowing
- Gastrointestinal system (belly): nausea (feeling sick), pain or cramps, vomiting, diarrhea
- Cardiovascular system (heart): pale or bluish complexion, weak pulse, fainting, dizziness/vertigo, shock
- Other: anxiety, feeling of “imminent danger”, headaches, uterine cramps, metallic taste in the mouth
The most dangerous symptoms of an allergic reaction are:
- Difficulty breathing caused by swelling of the airways (including a severe asthma attack in people with asthma);
- A drop in blood pressure causing dizziness, malaise, feeling weak or fainting.
- Both of these symptoms can lead to death if left untreated.
Do not forget :
- Do not ignore the first symptoms.
- Always take a potential reaction seriously and act quickly.
- Not all reactions are alike; a person's symptoms may vary from episode to episode.
- Anaphylaxis can occur even in the absence of skin symptoms such as hives.
- A child may describe their symptoms differently than an adult: for example, they might say, "It tickles in my throat" or "I have an itchy tongue."
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