Thanks @pathforger :-)
Yeah, I think it might be irritated due to repeated use. The skin has already healed and I'm taking the band-aid off in the evening so it can breath at night. I hope it'll get less irritated soon :-)
My setup is definitely due for an update! My regular desk is still in my old home, so I'm using a table in the cabin. It's not having a good effect on me. I'll be happy when I have my desk here. I'll be able to stand for a while aswell, because I can change the height on it :-)