Psoriasis is an immune system disease and affects the skin. The most common symptom is seen as an extreme rash on the hands, legs and other areas on the body. Homeopathic treatments are extremely effective in the treatment of psoriasis as the medications treat the underlying cause. Sometime it may look like the medicines in increasing the problem, but it resides over time. There is no need to worry as the increase in the rash is a symptom of the treatment working.