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.
Hives, or urticaria, can create intense itching along with bumpy welts. Allergies to food, pollen, or drugs can cause hives to erupt anywhere on the body. Among the most common of skin welts in humans, these conditions usually disappear within 12 hours. Ad.
Quick Answer. Welts may be caused by a sharp blow or by an allergic reaction, according to MedicineNet. They are raised red areas on the surface of the skin that may or may not be itchy. A welt may be in the form a ridge, a bump or other swelling. Continue Reading.