A type I hypersensitivity reaction occurs when the immune system produces an overabundance of IgE antibodies to counteract an allergen. Learn more about the pathophysiology of type I hypersensitivity and discover how it relates to anaphylactic shock. ...
During a reaction, your immune system releases antibodies. These are proteins that deliver a message to cells: Stop that substance! The cells then send out histamine, which causes blood vessels to expand, and other chemicals, and these trigger the allergy symptoms. ...
Eczema:Also known as atopic dermatitis, it is a skin condition. Most types ofeczemaare notallergies. But the disease can flare up when you're around things that cause anallergicreaction. Your body's immune system overreacts to substances, calledallergens, that are usually not harmful. You mig...
An allergic reactionis the body's way of responding to an "invader." When the body senses a foreign substance, called an antigen, the immune system is triggered. The immune system normally protects the body from harmful agents such as bacteria and toxins. Its overreaction to a harmless substa...
You may be allergic to other medicines if you had an allergic reaction to an antibiotic. Make sure you know the names of other medicines that you should not take.Call 911 for signs or symptoms of anaphylaxis,such as trouble breathing, swelling in your mouth or throat, or wheezing. You may...
Also found in: Dictionary, Thesaurus, Medical. rhinitis[rī′nīd·əs] (medicine) Inflammation of the mucous membranes in the nose. McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc. The following article is from The Great...
Try to identify the allergen and have the person avoid additional contact with it. If the person develops a rash, apply cool a compress and hydrocortisone. Watch the person for signs of increasing distress. Get prompt medical help. If the allergic reaction is severe, call 911 immediately....
Allergic Reaction to Local Anesthetics | Management of Pediatric Medical Emergencies in the Dental Office | Continuing Education Course on dentalcare.com
Since ancient times, people have always been drawn to allergic diseases, studying their pathogenesis and developing related treatments. The earliest recorded allergic reaction in human history was the death of the Egyptian pharaoh Menes after being bitten by a bumblebee around 2641 BCE.17Theories on...
Read the label on any medicines first. Parents of children and people with medical conditions should talk with a pharmacist if they have questions about a medicine's use. Treatment if You’re Allergic If you have a severe allergic sting reaction, you’ll need epinephrine, which you can inject...