Medically reviewed by Corinne Savides Happel, MD Acute urticaria (hives) is a common skin condition that affects up to 20% of people at some point in their lives. It can transition into chronic ...

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.

There are two main types of hives (which doctors refer to as "urticaria"), based on how long symptoms last. "Acute urticaria" refers to symptoms that come and go for up to 6 weeks, while "chronic ...

The good news, though, is that most episodes of hives or "acute urticaria" disappear within a day without treatment. Hives that come and go for longer than 6 weeks are known as "chronic urticaria." ...

If the rash comes and goes within 24 hours, it is most likely hives. But hives can either be acute or chronic. The two types share many common triggers. The big difference is timing.

Hives are usually an allergic reaction, ... Schaefer P. Acute and chronic urticaria: Evaluation and treatment. Am Fam Physician. 2017;95(11):717-724. American Academy of Dermatology.

An acute case of hives may persist for about six weeks. If the skin breakout lasts longer than that, it might be a case of chronic hives. Most cases of hives go away on their own, ...

Acute urticaria refers to cases where symptoms resolve on their own within six weeks, whereas chronic urticaria lasts longer. Furthermore, inducible urticaria is the term for cases that have ...

Odds are you’re familiar with this common, and usually temporary, skin eruption. Research estimates that there is up to a 15% to 20% chance you’ll be affected by acute hives at some point in ...

They typically disappear within 24 hours. But unlike acute hives, they come back frequently, with entire episodes lasting more than 6 weeks. There’s also no known trigger.

Chronic urticaria differs from acute urticaria in characteristics and treatments. The chronic form is spontaneous or inducible, with the latter elicited by cold, heat, pressure, or other precipitants.

Stanford Infectious Diseases' Dr. Anne Liu explains why people are reporting getting hives after recovering from COVID-19. ... Up to six weeks is considered acute hives, or short-term hives.