I am having issues with my skin The areas are

Patient: I am having issues with my skin. The areas are focused to 3 spots. My forearms, the back of my neck, and my nose. It only happens during the summer in direct sunlight. I get tiny blisters and welts that eventually turn into scabs and on occasion form puss under the skin. It’s red and irritated and gets extremely itchy. I’ve taken allergy pills, used sunscreen, used after Sun lotion, anti itch cream, even tried cleaning my skin with witch hazel and rubbing alcohol. Nothing is working. What’s wrong with me?

Doctor: