Most hives resolve quickly, but they can become chronic. Acute urticaria refers to hives lasting one day to six weeks. Chronic urticaria means the hives have lasted for six weeks or longer.

Urticarial vasculitis is a chronic autoimmune condition that causes hives on your skin. Learn about symptoms, causes, complications, and treatment options.

Pictures of hives, also known as urticaria, can help you to identify these raised, red, itchy bumps or welts. Hives can affect people of any age on any part of the body. Causes include stress ...

A person can develop an allergy at any age. Learn more about adult-onset allergies and their causes.

Researchers are recruiting adults (≥18 years old) who suffer from cold urticaria, symptomatic dermographism, pressure hives, solar hives, heat hives, vibratory angioedema, exercise hives, contact ...

Exercise-induced urticaria is a rare condition in which you experience hives during or after exercise. Learn more.

Chronic spontaneous urticaria is an inflammatory skin disease that causes hives that last for at least six weeks. Derms explain the causes and treatments.

Certain medications, supplements, and lifestyle strategies can help ease the itch from chronic hives.

CSU is a chronic skin condition that causes hives and persistent itch. The positive trial confirms results from Study A, the first Phase 3 trial of Dupixent in this setting.

Often misunderstood, CSU is a chronic skin condition that affects about 20 percent of people at some point during their lives and causes hives, swelling, and intense itching, with no clear trigger ...