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4. Allergic Reaction

A severe allergic reaction (anaphylaxis) can cause blood vessels to widen and blood pressure to plummet. Common triggers include insect stings, shellfish, nuts, and latex. Symptoms include swelling, difficulty breathing, and confusion. If you suspect anaphylaxis, use an epinephrine injector and call emergency services immediately.

Illustration of a woman sneezing into a tissue, flanked by a hand holding a white cat on one side and a hand offering a bouquet of flowers on the other. The image suggests allergic reactions to pets or pollen.

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This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.