The allergic process, called atopy, occurs when the body overreacts to a substance that it senses as a foreign invader." The immune system works continuously to protect the body from potentially dangerous intruders such as bacteria, viruses, and toxins. However, for reasons not completely understood, some people are hypersensitive to substances that are typically harmless. When the immune system inaccurately identifies these substances (allergens) as harmful, an allergic reaction and...
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Source: Breastcancer.org
Allergic reactions happen when your body is sensitive to a specific substance. The reaction can happen when you swallow or inhale the substance or... Read more »
Source: ADAM Encyclopedia
Allergic reactions are sensitivities to substances, called allergens, that come into contact with the skin, nose, eyes, respiratory tract, and... Read more »
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Image of a skin rash caused by an allergic reaction... Read more »