Hives is a skin rash that can cause the skin to be red and have itchy bumps. Learn possible reasons to have rashes and treatments. Learn what causes hives, how symptoms appear on different skin tones, and the best treatments and home remedies for relief and prevention. Find out about hives (also called urticaria), which is a raised, itchy rash that's usually caused by a reaction to things like food, pollen, insect bites or chemicals. There are several types of hives, including: Acute urticaria. These are hives that last less than 6 weeks. The most common causes are foods, medications, and infections. Insect bites and. Learn the causes, symptoms and treatment options for hives (urticaria). Hives are itchy, red bumps that show up on the skin. They’re pretty common, with 1 out of 5 people getting hives at some point in their lives. People might see just a few spots in one area of their skin, or they might see hives all over their body. Hives typically occur as an allergic response to something in your environment or something you ate. But they may sometimes happen because of an underlying health issue. Hives, also known as. Hives, also known as urticaria, are raised, itchy welts on your skin that occur due to an allergen. The reaction is uncomfortable, but it’s often not serious. Hives, also known as urticaria, is a kind of skin rash with red or flesh-colored, raised, itchy bumps. [1]. Hives may burn or sting. [2]. The patches of rash may appear on different body parts, [2] with variable duration from minutes to days, and typically do not leave any long-lasting skin change. [2]. Hives (urticaria) is a rash on the body. Identifying what triggered the hives is crucial to preventing them from happening again. If you can identify the trigger, you may be able to avoid. Hives are raised bumps or welts that are usually itchy. Learn about triggers and treatment.