I’m so sorry you’re not getting any improvement from your current topical treatment. That has to be terribly frustrating for you. You’re not alone thought, because psoriasis is one of the most prevalent skin disease in the world.
Is this a relatively new diagnosis for you? Do you have plaque psoriasis?

If this treatment isn’t working, has your dermatologist discussed other options for you? There is an ultraviolet light therapy as well as the medications I mentioned in my earlier reply.

Psoriasis is caused by an increase in normal skin cell production. Usually new skin cells are replaced every 10 to 30 days. With psoriasis, new cells grow every 3 to 4 days. The buildup old cells with layers of new cells is what produces the scaling and flaking. The light therapy can slow the growth of the skin cells.

Do you notice anything that triggers a flare up?