I've had all three. I'm not sure if my hair loss was due to vitamin difficiency, meds, or genes. My mother's hair is thinning and not coming back. My loss has always slowed and thickened back to pre-thinning days.
For years I've had a small patch of psoraisis at the base of my scalp. In the past few months, the psoraisis has diminished and been replaced by huge patches that look more like exzema (sp?). I had exzema as a baby......Not sure if this is the same thing. But I've also had patches come up on my eyelids. It's slowly going away on my face, but it remains on my scalp.
I've used Head&Shoulders Intensive Solutions twice this week and will continue to see if it helps. The guy that does my hair suggested it--he said it worked for him.......we'll see.