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Anaphylaxis is a severe allergic reaction, and its symptoms can vary from person to person and depending on allergen exposure. The most common signs and symptoms are generally observed in the following systems:
* Skin Reactions: Hives (urticaria), itching, rash, redness, and widespread swelling (angioedema). Skin symptoms may not be present in some cases (approximately 10%).
* Respiratory System: Difficulty breathing (dyspnea), wheezing (stridor/wheezing), coughing, runny nose, itchy nose, sneezing, swelling of the tongue and/or throat (risk of airway obstruction).
* Cardiovascular System: Low blood pressure (hypotension), increased (tachycardia) or decreased (bradycardia) pulse rate, dizziness, fainting.
* Gastrointestinal System: Nausea, vomiting, abdominal pain, cramps, and diarrhea.
* Other Symptoms: Fatigue, weakness, and rarely urinary incontinence.
Anaphylaxis signs and symptoms typically appear within the first two hours after contact with an allergen. This period can be as short as a few minutes or, in some cases, extend up to 4-6 hours. For diagnosis, involvement of at least two organ/system is generally required. Involvement of the respiratory and cardiovascular systems poses a life-threatening risk.
Rapidly developing isolated symptoms such as hoarseness, a feeling of throat constriction, or low blood pressure after exposure to a known allergen (e.g., bee sting or medication use) can also indicate anaphylaxis. Different symptoms may occur in the same person at different times and with different triggers.
What are the Symptoms of Anaphylaxis?
* Skin Reactions: Hives (urticaria), itching, rash, redness, and widespread swelling (angioedema). Skin symptoms may not be present in some cases (approximately 10%).
* Respiratory System: Difficulty breathing (dyspnea), wheezing (stridor/wheezing), coughing, runny nose, itchy nose, sneezing, swelling of the tongue and/or throat (risk of airway obstruction).
* Cardiovascular System: Low blood pressure (hypotension), increased (tachycardia) or decreased (bradycardia) pulse rate, dizziness, fainting.
* Gastrointestinal System: Nausea, vomiting, abdominal pain, cramps, and diarrhea.
* Other Symptoms: Fatigue, weakness, and rarely urinary incontinence.
Anaphylaxis signs and symptoms typically appear within the first two hours after contact with an allergen. This period can be as short as a few minutes or, in some cases, extend up to 4-6 hours. For diagnosis, involvement of at least two organ/system is generally required. Involvement of the respiratory and cardiovascular systems poses a life-threatening risk.
Rapidly developing isolated symptoms such as hoarseness, a feeling of throat constriction, or low blood pressure after exposure to a known allergen (e.g., bee sting or medication use) can also indicate anaphylaxis. Different symptoms may occur in the same person at different times and with different triggers.