I was diagnosed with psoriatic arthritis several years ago. Before the joint problems started I had what they call pustular psoriasis on the bottoms of my feet and some on the palms of my hands. Not fun at all. But it went away and so far haven't had any more psoriasis although I get eczema off and on.
A year ago after many years of suffering and some joint damage I just couldn't take the pain anymore. First I was put on Enbrel but had a reaction at the injection site so they switched me to Humira. Recently had to increase to an injection every week rather than biweekly. It's worked really well for me. Some days I almost forget I have arthritis.
My Dad had very bad psoriasis and so did my Uncle. I ended up with the PA and my cousin has AS. Guess it's all in the genes.