Urticaria, which is also known as hives, is a skin condition which causes itchy, raised rashes that can appear suddenly and vary in size. It may be triggered by things like heat, stress, or certain foods — or sometimes, there’s no clear cause. While symptoms can be uncomfortable, many people find relief through simple treatments and lifestyle changes. This section explains more about Urticaria is, what causes it, and how it can be treated — so you can feel more confident in caring for your skin.