Last night in the shower I noticed some weird kind of rash going down my legs. I’ve had it before, only when I shower though. At that point no shower gel or anything, only water, has touched my skin. Neither do I shower very hot. Now I’m starting to get it on my hands too. What is this?

I’ve already set up a doctors appointment weeks ago, as I’m also suffering from an extremely itchy and flakey scalp. In the past I’ve had eczema on my cheeks and neck, but no doctor ever diagnosee with anything