Understanding Urticaria (Hives): What You Need to Know

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
- Acute Urticaria:
- Lasts less than 6 weeks
- Usually caused by infections, foods, medications, or insect stings
- Chronic Urticaria:
- Lasts more than 6 weeks
- Often no clear trigger — your immune system can overreact without an obvious reason
- 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:
- Foods: Nuts, shellfish, eggs, or fresh fruits
- Medications: Antibiotics, NSAIDs (like ibuprofen)
- Infections: Especially in children
- Stress or temperature changes
- Sometimes… we never find the cause!
When Should I See an Allergist?
If you have hives that:
- Last more than a few days
- Keep coming back for weeks or months
- Causes severe itching or swelling of your lips, tongue, or throat (seek emergency care if you have trouble breathing!)
An allergist can help determine the cause and develop a plan to manage your symptoms.
How Is Urticaria Treated?
- Avoid known triggers if you have them.
- Antihistamines are the mainstay of treatment — your doctor may adjust the dose or combine different types.
- In some cases, other medications like omalizumab (an injectable antibody) can help chronic hives that don’t respond to standard treatment
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!