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Hives/Urticaria & Angioedema

Urticaria – also known as hives, weals, welts or nettle rash – is a raised, itchy rash that appears on the skin. It may appear on one part of the body or be spread across large areas. 


Urticaria occurs when a trigger causes high levels of histamine and other chemical messengers to be released in the skin. These substances cause the blood vessels in the affected area of skin to open up, often resulting in redness or pinkness. 


Angioedema occurs when weals are large, often affecting lips or eyelids, even the mouth, but can occur anywhere.


Triggers can include:

  • an allergic reaction – such as a food allergy or a reaction to an insect bite or sting

  • cold or heat exposure 

  • infection – such as a cold

  • certain medications – such as non-steroidal anti-inflammatory drugs (NSAIDs), antibiotics and ACE inhibitors.

  • Autoimmunity (chronic urticaria/ angioedema)


Our experts at the LAC can determine the nature of your urticaria or angioedema and recommend treatment accordingly.

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