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Understanding Urticaria (Hives): What You Need to Know

Person scratching their arm, that has hives on it.

What is Urticaria?

Urticaria is the medical term for hives — raised, red or skin-colored welts that can appear anywhere on your body. They often itch, burn, or sting. Hives can vary in size and shape and usually last for a few minutes to several hours before fading. Sometimes they come and go over days or weeks.

Types of Urticaria

  1. Acute Urticaria:
    • Lasts less than 6 weeks
    • Usually caused by infections, foods, medications, or insect stings
  2. Chronic Urticaria:
    • Lasts more than 6 weeks
    • Often no clear trigger — your immune system can overreact without an obvious reason
  3. Physical Urticaria:
    • Triggered by pressure, heat, cold, sunlight, or even scratching the skin (dermographism)

What Causes Hives?

Hives happen when your body releases histamine, which makes small blood vessels leak fluid, causing swelling in the skin. Common triggers include:

When Should I See an Allergist?

If you have hives that:

An allergist can help determine the cause and develop a plan to manage your symptoms.

How Is Urticaria Treated?

We’re Here to Help

Living with hives can be frustrating, but you don’t have to do it alone. Our allergy team is here to help you find answers and relief. If you’re struggling with hives, contact us today to schedule a consultation!