I am having red itchy bumps on my wrists, arms legs, toes. I am trying not to scratch. I have just newly built a pretty large addition to my house. I feel like this reaction could be coming from the allergens in the air from paint, sheet rock, dust, and or the installation materials that is in my environment. These materials are not suppose to be toxic, and other members of my family have had some of these symptoms, however my mother said that she doesn't itch.