Anaphylaxis is a severe, potentially fatal allergic reaction. “And it can show up in a lot of different ways,” Dr. Gross says. You might picture someone’s throat closing up, but warning signs can range from itchy hives all over a person’s body, eye swelling, lip swelling, trouble breathing, dizziness, stomach issues, or just feeling “off.”
Continues Dr. Gross: “With milder allergies, like things out in the environment, we think of itchy eyes or sneezing. But with these anaphylactic reactions, it affects the whole body and more organs, and can have really detrimental effects.”
Additionally, anaphylaxis doesn’t look the same every time. “That’s a myth that we really try to educate about,” Dr. Gross says. A mild reaction once doesn’t guarantee the next one won’t be serious.
Source:
https://www.thehealthy.com/allergies/allergic-anaphylaxis-patient-story/