I have had that patch on my finger for at least a year now. 

It normally is not open but just a discoloured patch of skin that feels harder than surrounding skin.

Every few months it starts itching like crazy. 

And because I apparently then rub it without realizing until the outer skin layer separates into a blister and part of the skin comes off (thus making the open wound in the picture). And only thrn I realize I rubbed and scratched it too much. 

Under that skin it feels hard when touching the spot, like an insect bite can feel hard from swelling. Just that it does not feel like one big thing but like it's multiple tiny "swollen" spots under there. 

And it does not stop itching! One time there was nearly no skin left on it. And then some day itching stops, it heals over...staying discoloured until it starts itching agsin. 

No flaking. No splitting open by itself. 

The GP just sais "eczema" and gives a hydrocortisobe cream that does not help at all! Dermatologist all say "we are full, no new patients" so I am in my own with this. 

I am slowly going crazy thinking "what if it is csncer and they do nothing until it the finger has to come off or it spreads and I die?!" 

Any idea what that really is? (Not a wart, read text please!)