What to Know About Anaphylaxis: Symptoms, Triggers & Treatment

THURSDAY, Sept. 11, 2025 (HealthDay News) — When people hear about anaphylaxis, they often associate the severe allergic reaction with food allergies. And while food allergies can cause anaphylaxis, allergies to insect stings, medications and latex can also trigger the response.

Anaphylaxis is rare. In most cases, people with allergies develop mild to moderate symptoms, such as watery eyes, a runny nose or a rash. But sometimes, exposure to an allergen can cause the life-threatening allergic reaction known as anaphylaxis. 

A second anaphylactic reaction, known as a biphasic reaction, can occur anywhere from 12 to 24 hours after the initial reaction.