Psoriasis is a genetic condition that can be passed down in a family. This explains the fact that both Kim Kardashian and her mother have psoriasis. However, just because a parent has the condition does not mean their children will definitely have it, but it is likely to show up somewhere down the family line. Psoriasis is purely genetic and is not caused by stress, allergies, infections, deficiencies and so on. Although, some of these can be triggers for a flare-up.