Oct 14, 2022 · What are hives? Hives are raised red bumps (welts) or splotches on the skin. They’re a type of swelling on the surface of your skin and happen when your body has an allergic reaction. …

Mar 16, 2024 · Urticaria, also known as hives, is an outbreak of pale red bumps or welts on the skin that appear suddenly. The swelling that often comes with hives is called angioedema.

Hives can appear anywhere on the surface of the skin. Whether the trigger is allergic or not, a complex release of inflammatory mediators, including histamine from cutaneous mast cells, results in fluid …

Jul 18, 2023 · Hives, or urticaria, are itchy, raised welts that are found on the skin. Hives are often caused by an allergic reaction. Learn the signs and how to identify them.

Dec 8, 2025 · Hives are little bumps caused by an immune system reaction and can be short-term or chronic, and typically resolve on their own. Relief can be found from medications, anti-itch products, …

Aug 6, 2025 · Summary Hives are red and sometimes itchy bumps on your skin. An allergic reaction to a drug or food usually causes them. Allergic reactions cause your body to release chemicals that can …

Sep 11, 2025 · Hives can present with a variety of symptoms, including wheals, angioedema, and itching. You might also develop systemic symptoms, such as headaches and nausea. The primary …

Oct 27, 2023 · Hives — also known as urticaria (ur-tih-KAR-e-uh) — is a skin reaction that causes itchy welts that range in size from small spots to large blotches. Hives can be triggered by many situations …

Apr 1, 2025 · Definition Hives are raised, usually itchy, red bumps (welts) on the surface of the skin. They can be an allergic reaction to food or medicine. They can also appear without cause.

May 30, 2024 · What are hives? Hives Hives are a skin reaction that causes bumps, raised patches, or both to suddenly appear. These bumps and patches often itch intensely. Most cases of hives are …