What about genes?

[Caroline]

I can understand what you are implying Caroline, it could be what we see as Psoriasis may be fundamentally different in a genetically predisposed sufferer to a someone with a random flair up. It's just we don't understand the disease enough.
What I'm trying to say is both the hypothesis and the Doctors statement could both be true

What in my opiniion is true is that:

• The cause of psoriasis may be due to genetic predisposition, if your ancestors have it, you have a higher chance of getting it.
  
• Anybody, without genetic predisposition, can also get Psoriasis. Be it because of a bacterial or other cause.