Histamine Reaction to Insect Bites

When an insect bites, it injects saliva that can trigger the body’s immune system. In response, the body releases histamine, a chemical that helps fight off the perceived threat. Histamine increases blood flow and causes inflammation in the affected area, leading to symptoms like redness, swelling, and itching. This reaction is a part of the body’s defense mechanism, helping to heal the bite but sometimes resulting in discomfort. Most people experience mild reactions, but severe allergies can lead to more serious symptoms that require medical attention.