As head of Americaâs largest oil company, Mr. Tillerson has earned a friendship award from Russia and voiced skepticism about American sanctions that have halted some of Exxon Mobilâs biggest projects in the country.
Top 10 facts about the world. Welts are bumps in the skin that are caused by a fluid buildup directly below the surface of the skin. A number of things can lead to the development of a welt, ranging from trauma to the skin to an allergic reaction.
These itchy welts can show up anywhere on your skin. Theyâre caused by an allergic or other type of reaction. Your doctor may call them urticaria. They can last a few minutes or several days before they go away. Sometimes theyâre a sign of more serious problems, especially when you have trouble breathing. Hives that recur or that last more than 6 weeks are considered chronic urticaria and require further evaluation.