MrsD:
My husband also has Psoriasis and, as yours, takes flax seed oil and fish oil. It has helped tremendously. This year, on his annual trek, he went to Brazil and was in the sun quite a bit. The sun helps a lot with keeping it cleared up too.
I think I posted on this part a while back, but if not: A lady in our area has this so badly, her body is just covered with it. She has one of those stand up sun tanning booths and I am pretty sure her doctor prescribes certain amounts of exposure to help keep this under control. Not that Alan needs UV exposure all over, but I was wondering if they still make those little individual sun lamps that expose very small areas of the body. If so, maybe Alan could try that. They used to be very inexpensive.
Of course, "used to be" was a while back...
Cathie