Types of Allergic Reactions

Anaphylaxis

Anaphylaxis is an allergic reaction that involves the whole body. It is a serious condition that should be treated immediately. While most people think that it is only allergens in dairy and tree nuts that bring on anaphylaxis, there are other triggers too, for example, latex and insect bite allergies.

Contact Dermatitis

Contact dermatitis refers to any reaction that occurs when skin comes into contact with irritants or allergens. It usually manifests as a rash, redness or blistering. Nickel allergies and a sensitivity to formaldehyde are examples of contact dermatitis.

Atopic Dermatitis

Atopic dermatitis is a chronic inflammatory disease that usually begins in very early childhood. In children it can indicate a tendency toward asthma and/or allergic rhinitis (hay fever). It is characterised by itchy, dry skin, and is often accompanied by redness and blisters. Eczema is an example of atopic dermatitis.

Urticaria

Urticaria are more commonly known as hives. These red, itchy bumps vary in size and appear in the shallow layers of the skin. They are caused by histamine being released, most often as an acute reaction to substances such as medications or latex.

Angioedema

Angioedema is a deep swelling of the skin. It is similar to hives, but it occurs in deeper skin layers, whereas hives occurs in the superficial layers. Angioedema often involves the face, tongue, extremities or genitalia and commonly occurs in conjunction with hives as a reaction to allergens or irritants.