Psoriasis is a skin related, immune-mediated disease (one that is caused by abnormal functioning of the immune system of the body), which results in silvery-white appearance. There are certain treatment methods to suppress the symptoms. Though this disease is not contagious, it leads to other health scares such as stroke.

Psoriasis is known to set in when the immune system of the body mistakes healthy cells for pathogens and starts sending signals that result in the overproduction of more skin cells. This overproduction of skin cells results in accumulation of skin at certain body parts. It may affect skin on the scalp, knees, elbows, genitals, and soles of feet.

The different types of psoriasis include plaque, erythrodermic, pustular, guttate and inverse. Symptoms of the disease include plaque covered with silvery scales, mild to thick scaling on scalp, pits in the nails, discoloration of toenails and that of fingernails in some cases.