Thanks for writing in.
Psoriasis is a chronic disease and needs specialized care and treatment.
You also seem to have arthritis and vasculitis.
Consider a visit to dermatologist
for proper treatment and for prescription drugs.
Discuss the option of Cyclosporine
with your doctor.It is a wonderful drug and will help a lot in long term remission.
with narrow band UVB light would be helpful.
Hope this helps.