Help with skin condition

37M Hello, I was hoping for some help diagnosing a skin condition I've been dealing with. For the past few years I've had these red dot/bumps on my forearms exclusively. They've never given me any trouble, (itching/soreness etc.) just ugly. So I never had much of a concern about it and haven't tried any treatment. Recently within the past 4 months, they seem to have spread, specifically to under my armpits. Also another change they have turned extremely itchy, both under my armpits as well as my forearms.

In a effort to help, I switched my soap to Dr. Bronners and switched to a more natural deodorant. This has not made it any better, and not any worse. I haven't changed my diet, except I've been trying to eat less gluten for the last year to support my wife. Any ideas? https://imgur.com/a/bfOvRf1