Our Intensive Repair Conditioner has not been formulated specifically to treat psoriasis/dermatitis, but it does contain natural, gentle ingredients so it will not irritate the scalp. One of the ingredients our Intensive Repair Conditioner contains is Organic Marshmallow Extract, high in plant protein, which aids to soothe a dry scalp. It also contains Quinoa Protein which provides exceptional skin hydration and skin softening properties. It has a high mineral content to avoid the production of dandruff, helping to soothe the scalp.