Does Dh Always Itch?

I've had spots that appear mostly on my hands, wrists, and arms for about 6-7 years now. I've also had them show up on my legs, tops of feet, my lip, elbows and occasionally my back. I always thought it was eczema or psoriasis, but am now wondering. The spots usually present as small, round dry spots that will grow in size but are typically barely raised. Generally, they don't itch much, are just very dry and rough. Occasionally, these areas will itch like crazy for a day or two, but then go back to just being a nuisance and quite unsightly. They are usually pink and dry, but sometimes will turn into a "lesion." When they are itchy, they are bright red/maroon. I never get the blisters that are typical of DH. My spots will last for months, and once they are gone the skin is white. Hence, I have lots of white spots up and down my arms. Biopsy of a spot on my leg was inconclusive, but doc said her gut feeling was that it's the early stages of psoriasis, that it can sometimes take years to fully develop. I've seen pics here that look very similar to mine, so now I wonder if I should have had it tested for DH (I know this must be done on clear skin adjacent to a lesion). But because it doesn't constantly itch, I also wonder if could be DH??

I have one area that I know has to be DH. It's at the top of my butt and tingles/itches before an eruption. While it's active, it itches like crazy, but can be tender if scratched or rubbed. It's always in the same place. If it rears its ugly head again, I will definitely call to have a biopsy done immediately.

Thank you for any thoughts.