Hi!
I am also a psoriasis sufferer - a mild guttatae form, but fairly widespread - limbs, trunk, hands, which started about 15 yrs ago after a Strep throat infection, and never went away. It was always worse when I was stressed, responded well to sunny holidays, topical steroids, but always returned.
Well, since starting HRT 18 months ago, I have noticed a marked improvement in my skin condition, despite no other significant changes in lifestyle/diet, and a whole bucket full of stress at times ....
I asked my Meno consultant about this positive 'side issue' and she agreed that there is a hormonal link.
However, I asked the same question to my consultant Derm who said she was not sure if it was the HRT that had improved things - she said psoriasis is a mysterious thing !
I have read reports that during pregnancy psoriasis can improve considerably, only to return after the pregnancy is finished, which suggests a link to hormones I would guess.
Hope you also seen an improvement