Of individuals who suffer from psoriasis, approximately 80 percent of them suffer from a mild form of the disease. This is where there are a few patches that may need treatment but are not likely to cause problems and can be easily control.
Approximately 15 percent of the people have moderate psoriasis when more skin is involved and the condition is widespread. In individuals who have severe psoriasis (5 percent of people) a large area of skin is covered with psoriasis and the condition becomes difficult to manage by themselves or will no longer respond to any treatment.
Normally skin cells mature at 21 to 28 days. During this time they travel to the surface of the skin where they are lost in a constant invisible shedding of dead cells. However, in individuals who have psoriasis, the turnover of skin cells is much faster. It happens in around four to seven days. This means that even live skin cells will reach the surface and accumulate with the dead cells.