Ralph, a 49-year-old man, presents with complaints of a red, raised, itchy rash on his anterior and posterior forearms for the past 6 months. Skin history is negative with the exception of changing his daily work at the furniture factory. Seven months ago, he began working on the assembly line, in which he prepares furniture after varnish has been applied. He confirms that he wears protective eyewear and gloves. Usually, he wears a short-sleeved shirt due to the temperature in the factory. What would be the most likely diagnosis of Ralph’s rash?
