Yes, tanning has helped my Psoriasis almost disappear....

Think about the detergent you use on your sheets. Make sure it's not tide or other strong ones. I stick with the baking soda type and rinse really well. It definitely makes a difference for me., I was using one detergent and my skin was burning!!!! My daughter does not have psoriasis and experienced the same. I agree about the dryness with the furnace on and avoiding hot showers.

Benadryl in the evenings help me

I use a 24 hr allergy (claritin or zyrtec) which controls the itching.

I have pustular psoriasis on my feet and they constantly burn and itch. I have a compound prescription ointment with tar that does improve it. When it wakes me at night, I have a cool foot bath and rub lots of moisturizing creams On them.