Question

what is allergic reactions...​

Answer 1

Explanation:

Signs include trouble breathing, pale or blue skin, hives, itching, vomiting, or anxiety. Symptoms can start within just a few minutes after you come in contact with the cause.

Answer 2

Answer:

Allergic reactions are sensitivities to substances called allergens that come into contact with the skin, nose, eyes, respiratory tract, and gastrointestinal tract. They can be breathed into the lungs, swallowed, or injected.