A Medical Education Service for the Public Psoriasis on the body. Psoriasis is an inflammatory skin disease characterized by an increased rate of skin cell turnover resulting in thick scales appearing on the skin. The affected skin becomes dry and unsightly. Itching is often experienced in our hot and humid climate.
Psoriasis usually presents with red scaly patches on the scalp, body and limbs.
The scaly patches on the scalp are usually thicker and more extensive than ordinary dandruff. Common sites of the body affected are the elbows, the knees and the back. The cause of psoriasis is unknown. Studies point to a genetic predisposition, although complex interaction with environmental factors are necessary to trigger off the appearance of psoriasis. Once psoriasis starts, there will be periods of remission alternating with periods of active psoriasis.