Hay Fever Hay fever also known as allergic rhinitis is an immune disorder characterized by an allergic response to pollen grains and other substances. A condition in which exposure to a substance such as pollen latex animal dander or a particular food or drug causes an overreaction by the immune system that results in symptoms such as sneezing itching rash and difficulty breathing or swallowing.

Ppt Food Allergies Powerpoint Presentation Free Download Id 259132

Other allergies Environmental allergies are an immune response to something in your surroundings thats typically otherwise harmless.

What are allergies definition. Environmental allergies vs. Food allergies can result in an enormous variety of different symptoms. Many allergens are everyday substances that are harmless to most people.

Allergy is the exaggerated and out-of-place reaction of the immune system to external substances or stimuli that are not harmful to the body so the reaction actually damages the body instead of helping it. If you have a particular allergy you become ill or get a rash when you eat smell or touch something that does not normally make people ill. An allergen is a type of antigen that produces an abnormally vigorous immune response in which the immune system fights off a perceived threat that would otherwise be harmless to the body.

Allergic definition is - of relating to affected with or caused by allergy. For the Irish-registered pharmaceutical company see Allergan. These substances are known as allergens and are found in dust mites pets pollen insects ticks moulds foods and some medications.

A condition that makes a person become sick or develop skin or breathing problems because they. A condition that makes a person become sick or develop skin or breathing problems because they. Definition of allergy 1.

Pollen-food allergy syndrome. An allergy is a reaction the body has to a particular food or substance. A substance that causes an allergic reaction is called an allergen.

How to use allergic in a sentence. Such reactions are called allergies. Altered bodily reactivity such as hypersensitivity to an antigen in response to a first exposure a bee venom allergy so severe that a second sting may be fatal 2.

The may be pollen and foods as well. In this condition certain fresh fruits and vegetables or nuts and spices can trigger an allergic reaction that causes the mouth to tingle or itch. Allergies are very common.

Exaggerated or pathological immunological reaction as by sneezing difficult breathing itching or skin rashes to substances situations or physical states that are without comparable effect on the average individual. Also known as oral allergy syndrome pollen-food allergy syndrome affects many people who have hay fever. The definition of allergy Allergy occurs when a person reacts to substances in the environment that are harmless to most people.

See allergy Meaning pronunciation translations and examples. Theyre particularly common in children. Allergy definition an abnormal reaction of the body to a previously encountered allergen introduced by inhalation ingestion injection or skin contact often manifested by itchy eyes runny nose wheezing skin rash or diarrhea.

Theyre thought to affect more than 1 in 4 people in the UK at some point in their lives. Allergies are among the most common of medical disorders. It is estimated that 60 million Americans or more than one in every five people suffer from some form of allergy with similar proportions throughout much of the rest of the world.

Allergy to cats is one of the commonest causes of asthma.