I have a similar thing and it is definitely not the ecza suggested (I went on the page) and it's not scabies either. I noticed tiny bumps
appearing mainly on
the sides of my fingers. They started with just a couple, then grew into small clusters, then slowly disappeared again.
They don't itch. They're not large enough for anyone to really notice, unless you run your finger over the skin or look really close. The skin is a little painful, discoloured or unsightly.