What It Is

Hives are raised, itchy welts that can develop anywhere on the body. They often show up suddenly and may disappear just as quickly, only to return. For many people, hives become a daily or weekly problem that affects sleep, comfort, or confidence.

Angioedema deeper swelling of the lips, eyes, hands, or feet may occur along with hives.

The skin produces histamine which leads to the development of hives. The immune system produces an allergic response which triggers this reaction but certain cases last for an extended period when the immune system remains active without any identifiable trigger.

Common Symptoms

• Raised welts that may change size or shape
• Welts that move from one spot to another
• Itching, burning, or warmth
• Swelling around eyes, lips, or fingertips
• Red or skin-colored bumps

Triggers and Causes

• Hives may be triggered by:
• Foods (nuts, shellfish, eggs, etc.)
• Medications
• Viral or bacterial infections
• Temperature changes (heat or cold)
• Pressure on the skin
• Exercise or stress

In chronic hives, the cause is often autoimmune rather than allergic

When to See a Specialist

• You should schedule an appointment if:
• Hives last more than a few days or keep returning
• You wake up with hives frequently
• Swelling affects your eyes or lips
• Over-the-counter antihistamines do not work
• You are unsure what is causing your reactions