Answer: The main causes of psoriasis are still unclear. But most scientists have cited overactive immune system and genetics as the major contributing factors.
An autoimmune condition is when the body's cells start attacking itself. In psoriasis, the immune system starts attacking healthy cells after making them for bacteria or foreign invaders. This overaction by the immune system triggers rapid skin cell production, causing new cells to develop fast and shift to the surface.
As this process continues, the new cells will start piling up at the surface, causing psoriasis. Furthermore, if your family have a history of the skin condition in the past, it means you are the risk of developing it.