Psoriasis is a very common autoimmune proliferative disorder of skin.
is also common almost 1-2 % of population suffers from it.
positive people are more prone to psoriasis and also have severe psoriasis
But reverse is not true , that is if you are having psoriasis you are not at risk of developing HIV or you are not prone to HIV.
So dont worry about it.
Psoriasis can be controlled cannot be cured completely.
It can increase in winter and decrease in other season.
Some form of medication may have to be continued for lifelong.
It is not serious condition and no Internal organs are involved you will have normal life span.
So there is nothing to be worried about.