Allergic reaction

Introduction: Allergic reaction

Allergic reaction: Normally, the immune system is the body's defense against invading agents such as bacteria and viruses. In most allergic reactions, however, ... more about Allergic reaction.

Allergic reaction: An acute reaction through exposure to a particular allergen. More detailed information about the symptoms, causes, and treatments of Allergic reaction is available below.

Symptoms of Allergic reaction

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Medical Textbooks Online about Allergic reaction

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Wrongly Diagnosed with Allergic reaction?

• Misdiagnosis of Allergic reaction
• Underlying causes of Allergic reaction (possibly wrongly diagnosed)

Misdiagnosis and Allergic reaction

Chronic lung diseases hard to diagnose: Some of the chronic lung diseases are difficult to diagnose. Even the well-knowns conditions such as asthma or lung cancer often fail to be diagnosed early. Some of the chronic lung diseases with diagnostic difficulties include asthma (perhaps surprisingly), COPD, emphysema, chronic bronchitis, cystic fibrosis, mesothelioma, smoker's cough, AIDS-related respiratory conditions (see AIDS), chronic pneumonia, and other respiratory diseases. Rare possibilities include diseases like psittacosis (bird-related lung infection). See other types of chronic lung diseases....read more »

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Causes of Allergic reaction

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More information about causes of Allergic reaction:

• Medications, drugs, or substances causing Allergic reaction (506 listings)
• Drug interactions causing Allergic reaction (307 listings)
• Allergic reaction as a complication caused by other conditions
• Allergic reaction as a symptom
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Article Excerpts about Allergic reaction

Normally, the immune system is the body's defense against invading agents such as bacteria and viruses. In most allergic reactions, however, the immune system is responding to a false alarm. When an allergic person first comes into contact with an allergen, the immune system treats the allergen as an invader and mobilizes to attack. The immune system does this by generating large amounts of one type of antibody. When the allergen and the antibody connect, it signals the release of powerful inflammatory chemicals. These chemicals, like histamines, cytokines, and leukotrienes, act on the tissues of various parts of the body, such as the respiratory system. The result is the symptoms commonly associated with allergies. (Source: excerpt from Allergies: NWHIC)