How To Treat A Severe Allergic Reaction, Signs & Symptoms – First Aid Training – St John Ambulance

An allergy is a body’s unexpected reaction of something it has come into contact with. Something that triggers an allergic reaction is called an allergen. One of the most common allergens is plant pollen, which often causes hayfever. Other allergens include animal hair, insect stings, specific drugs and foods, especially penicillin, shell fish and nuts….