Psoriasis results from skin cells growing too quickly. Depending on varying signals in the immune system, new skin cells can even form in days. What happens is that instead of the body shedding the excess skin cells, they pile up and form lesions.
The lesions do vary in appearance because there are many types of this condition. The five known types are plaque, pustular, guttate, inverse and erythrodermic. Nonetheless, majority of people live with the plaque type.
Another thing to note is that psoriasis can also affect the nails hence there will be a notable change in either the fingernails or toenails or even both.
However, the condition is not contagious but tends to have links with a personís genes and immune system. The very nature of the cause is complex, so much so that scientists are yet to clearly explain what happens when it develops. All the same, not everyone that inherits genes for psoriasis gets it.