1 By Nisid Hajari Nisid Hajari is a member of the Bloomberg View editorial board and author of âMidnightâs Furies: The Deadly Legacy of Indiaâs Partition,â to be published by Houghton Mifflin Harcourt on June 9. By Nisid Hajari Nisid Hajari is a member of the Bloomberg View editorial board and author of âMidnightâs Furies: The Deadly Legacy of Indiaâs Partition,â to be published by Houghton Mifflin Harcourt on June 9.
About Hives. Hives (or urticaria) are red raised bumps or welts on the skin. They can appear anywhere on the body and can look like tiny little spots or large interconnected bumps. Individual hives can last anywhere from a few hours to a week (sometimes longer), and new ones might replace those that fade.
When welts are a sign of a medical problem, they are usually accompanied by other symptoms which provide clues to the problem. Physical trauma such as a blow can cause a welt, and welts can also be caused by allergic reactions, infections, injections, insect bites, and skin reactions, in very sensitive people. For example, in people with dermographism, even a gentle touch to the skin can cause a welt to emerge.