Psoriasis is a genetic disorder of the skin that effect 1% of the population. Psoriasis begins in 80% of the people after the age of 30, about 10% get it before 30 years of age and 10% after 60 years of age. If one parent has psoriasis, the chance of the child getting it is about 16% and if both parents have it, the risk is around 50% or over. 70 to 80% will have localized psoriasis. Psoriasis remits with treatment and recurs.