PATHOLOGY

Detailed explanation-1: -Allergies occur when the body’s immune system misinterprets a foreign but otherwise harmless substance as harmful and then attempts to remove it from the body. The symptoms that occurs as a result of an over-zealous immune system is called an allergic reaction. The things that trigger the reaction are called allergens.

Detailed explanation-2: -Allergy is described as an exaggerated response from the body’s immune system to otherwise inert substances present in the environment.

Detailed explanation-3: -Allergic reactions (hypersensitivity reactions) are inappropriate responses of the immune system to a normally harmless substance. Usually, allergies cause sneezing, watery and itchy eyes, a runny nose, itchy skin, and rash.

Detailed explanation-4: -Asthma. The response in your lungs can cause coughing, wheezing, and trouble breathing. Eczema. An allergen causes an itchy rash known as atopic dermatitis. Allergic rhinitis.