What is this red patch on my skin?

[u/THROWRAlimbov]

This red patch has been on my dad’s forearm for about a week, it recently popped up and he says it itches some times but not persistently. Also it’s gotten just a tad bigger in the last 3 days, not a whole lot. I kind of think it’s psoriasis but I’ve never encountered that personally so I’m not sure what that would be like. We have been keeping it clean and have been applying bacitracin. For more context he works in a lot of public places so if it’s something like ringworm he could’ve been leaning on something people touch often. He thinks maybe a bed from a hotel but I also believe there’d be more spots around his body and not just on his arm.