This is not a direct response to your question, so please don’t take offense as I know nothing about your medical situation, but I feel compelled to talk as there may be others that it is relevant to in the CR.
If your or a loved one are experiencing any form of psoriasis, diet may be the answer. Try avoiding gluten, dairy and nightshades for a few weeks and see if symptoms improve. It may be difficult at first but it is doable, and hopefully when things get better you can try to reintroduce one food at a time.
Despite what doctors may tell you (that there are no studies proving that avoiding certain foods helps) the reason for this is that nobody had an incentive to create such a study.
A refuah Sheleima to those in need!