Eczema or Gluten Allergy?

So I’ve had this scaly patch of skin in the same spot for about a month now. It’s raised, and it itches a lot. Whenever it itches, both of my arms start to itch, and they get bumps all over them. I’ve used eczema lotion every night for two weeks, and nothing has changed. It’s actually getting bigger. Should I get tested for a gluten allergy?