Allergic Reaction

Allergic Reaction

An Allergic Reaction (pronunciation: /əˈlɜːr.dʒɪk riˈæk.ʃən/) is a response by the body's immune system to a substance that it considers harmful, known as an allergen.

Etymology

The term "Allergic Reaction" is derived from the Greek words allos meaning "other" and ergon meaning "work". It was first used in the early 20th century to describe an abnormal or altered reaction by the body.

Types of Allergic Reactions

There are several types of allergic reactions, including:

• Anaphylactic Reaction: A severe and potentially life-threatening reaction that can occur within seconds or minutes of exposure to an allergen.
• Contact Allergic Reaction: A skin reaction resulting from contact with an allergen.
• Food Allergic Reaction: An immune system reaction that occurs after eating a certain food.
• Drug Allergic Reaction: An immune system reaction that occurs after taking a certain medication.

Symptoms

Symptoms of an allergic reaction can vary from mild to severe and may include:

• Itchiness
• Rashes
• Swollen areas
• Sneezing
• Difficulty in breathing

Treatment

Treatment for an allergic reaction depends on the severity of the symptoms and may include:

• Antihistamines
• Corticosteroids
• Epinephrine (adrenaline)

Prevention

Prevention of allergic reactions primarily involves avoiding known allergens. In some cases, immunotherapy may be recommended.

External links

• Medical encyclopedia article on Allergic Reaction
• Wikipedia's article - Allergic Reaction

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