Hives
One minute your skin is clear. The next, itchy welts seem to appear out of nowhere.
Hives (also called urticaria) are raised, itchy welts that can develop anywhere on the body. They often appear suddenly and may disappear within hours, only to show up somewhere else. While hives can be alarming, they are usually temporary and often respond well to treatment.
Why Did I Suddenly Break Out in Hives?
One of the most common questions we hear is, “What caused this?” Unfortunately, there isn’t always a simple answer.
Hives can be triggered by:
- Foods
- Medications
- Viral illnesses or infections
- Insect stings or bites
- Heat, cold, or pressure on the skin
- Exercise
- Stress
Sometimes, despite a careful evaluation, no specific trigger is ever identified.



