Rogaine Help

[timmygoingbald]

Hey guys I just started using rogaine around 2 months ago and have gotten a couple side effects along with an effect that may or may not of been from rogaine so had a few questions.
Two side effects that I have been getting are slight redness of my scalp and also dandruff which is a very recent addition. I know online says if the redness persists to stop using rogaine but wanted to see around how long should I wait before I consider it "persisting".
The main reason I'm posting though is the picture attatched. I did have psoriasis as a kid and know it never really goes away completely. That being said aside from random dryness on one of my fingers randomly my psoriasis has been completely gone for around 15 years. Assuming that's psoriasis which I think it is, can rogaine spark something like that? Couldn't find anything on that online.