Hello, I am empathetic to your concern for hair fall and psoriasis. Hair fall can be due to stress, dietary imbalance. It can also be due to long term illness and in females due to low iron and hemoglobin level. Psoriasis in general do not cause hair fall. In my patients with your kind of problem I prefer to give vitamins in the form of biotin, calicium pantothenate and other vitamin B complexes. I also suggest you to increase you protein intake on daily basis. You should eat sprouts a lot of green leafy vegetables and sprouts which contain vitamins and minerals necessary for normal hair function. Reduce you stress as it is one of the most important cause of hair fall. Do yoga and meditation as it reduces stress and also helps in good immunity to reduce psoriasis. Take care.