Hives are a common skin rash that can be uncomfortable and disruptive. Our experts at Allergy and Asthma Specialists of Greater Washington offer individualized diagnostic and treatment plans so you can find relief. Call or schedule an appointment online today with our providers at one of our locations in Chantilly, Gainesville, Warrenton, Culpeper, or Front Royal.

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Hives Q & A

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What are hives?

Hives (also known as urticaria) are raised, red, itchy welts that form when the body releases histamine and other chemicals in the skin, causing itching and redness. They may develop suddenly, last for hours to days, and often come and go in waves. Sometimes hives can be traced to a specific trigger, but in many cases no clear cause is identified. Acute hives last less than six weeks, while chronic hives can persist for longer periods.

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What are the symptoms of hives?

Hives can look different from person to person but are typically:
 

• Raised, itchy welts or bumps on the skin

• Red or skin-colored patches that blanch (turn white) when pressed

• Spots that vary in size and shape, sometimes merging into larger areas

• Rashes that move around the body or change location within hours
   

In some cases, hives can be accompanied by swelling (angioedema), especially around the eyes, lips, or throat, which may require urgent medical attention.
 

What causes hives?

In some cases, hives can be linked to identifiable triggers such as:

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• Foods such as nuts, shellfish, eggs, or dairy

• Medications including antibiotics, aspirin, or NSAIDs

• Insect stings or bites

• Infections such as colds or sinus infections

• Environmental factors like heat, cold, sunlight, or pressure on the skin

 

Sometimes, hives can occur without a clear trigger, a condition known as chronic spontaneous urticaria.

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How are hives treated?

Treatment depends on the cause and severity. Mild hives often respond to antihistamines that reduce itching and rash. For more persistent or severe cases, prescription medications or advanced therapies (such as Xolair) may be needed. If hives are accompanied by swelling in the mouth or throat, immediate medical attention is required, as this may signal anaphylaxis. In such situations, an epinephrine auto-injector is the first-line treatment, followed by emergency medical care.