Most people catch the cold sore virus from a friend or relative when they're children. Once you have the virus, it stays in your body forever and may cause outbreaks anytime. While you have a cold sore you can pass it on to others, in fact, you may even be contagious right before a cold sore appears. The cause of psoriasis is not known, and the condition can progress through various stages of severity. The appearance of the patches may change also.
Psoriasis affects millions of men, women, and children of all ages and races.
All parts of the body can be affected. Sometimes psoriasis patches appear in certain areas such as elbows, knees, fingernails, face, or scalp. Psoriasis can be very uncomfortable. It does adversely affect appearance to the point that in some people it can be emotionally disabling. From this viewpoint, psoriasis can be a very serious disease.