Psoriasis is an autoimmune disease affecting the skin cells due to disturbance in blood.
Major types
a)Guttate Psoriasis
b)Plaque psoriasis
3)Inverse Psoriasis
4)Scalp psoriasis
5)erythrodermic psoriasis
6)pustular Psoriasis
7)nail Psoriasis
8)Psoriais of hands and feet
Psoriasis leads to Joint pains, referred to as Psoriatic Arthritis
The cause for Psoriasis is not known but it is triggered by various factors such as injury to the skin, alcohol , stress etc