I've noticed this for years! I got seborrheic dermatitis as a child when I was being bullied and it faded as I got older, but I've noticed that since my more recent trauma it flares up again, and when I'm having a bad time (as I am right now) it flares up again and I get dreadful dandruff, dry skin on my face, spots and those funny lumps on my upper arms as well, as well as eczema flaring up on my wrists.

Glad it's not just me..