Rashes while taking Inflectra?

I’ve been taking Inflectra doses for a few months now. Things are going well enough and I feel way better now and can eat things more than before.

However: I’ve noticed a bunch of red spots on my legs. Multiplying over time to the point where it looks like Psoriasis. My doctor did say I might have to go to a dermatologist for possible skin issues in the future.

Does this happen often with taking Inflectra? Do I need to tell my doctor to stop the doses? (I am seeing him in two weeks before another dose so there’s obviously time to brainstorm.)