Hello @nickkynl and welcome to Mayo Clinic Connect. Thank you for joining the conversation to share that you also have experience with what other members like @rush and @karenamara have shared.

It sounds like you have traced your steps back through your physical environment to see if anything could've caused this pattern to appear. I wonder if you've thought anymore about any other changes that could coincide with the rash appearing?

Do you have any symptoms as a result of the rash or just the pattern?