I've been getting psoriasis the last 2 years (been on Humira for 3) and was wondering if there was any correlation.... So if other's seem to get it; my understanding of psoriasis is it's caused from your liver being overworked and the toxins find a way to leave the body through the skin instead. I don't drink, smoke, take recreational drugs, my diet is relatively 'clean', only thing I can put it to is my Humira.