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.
The most common causes of itching are skin disorders: 1  Dry skin (see Xeroderma and Ichthyosis) 2  Atopic dermatitis (sometimes called eczema) 3  Contact dermatitis (an allergic rash resulting from direct contact with a particular substance)  Fungal skin infections.