Chronic hives complications include:

  • Difficulty breathing. When swelling occurs inside your mouth or throat, you may have difficulty breathing and pass out. Seek emergency medical care if you feel your tongue or throat swelling.
  • Serious allergic reaction. Anaphylactic shock (anaphylaxis) is a serious allergic reaction involving your heart or lungs. Your bronchial tubes narrow, it's difficult to breathe, and your blood pressure drops. You may feel dizzy, pass out or even die. Anaphylactic shock happens fast. Seek emergency medical care if you feel this type of allergic reaction coming on.

People with chronic hives may be at increased risk of developing these immune system disorders:

  • Thyroid disease
  • Lupus
  • Rheumatoid arthritis
  • Sjogren's syndrome
  • Celiac disease
  • Type 1 diabetes
Jun. 13, 2014

You Are ... The Campaign for Mayo Clinic

Mayo Clinic is a not-for-profit organization. Make a difference today.