The disease came and went on father but never cleared despite the nasty smelling, sheet-staining, night time tar ointments he applied generously. Psoriasis is a disease of unknown cause. It's not contagious, but is likely to run in families. Triggers which can cause the scaly patches are cuts, scratches, severe sunburn, a strep throat, dried out winter skin and lithium or propranolol. Although there is no cure, a lot can be done to make patients feel better.
Treatment can be tailor-made for age, disease, duration and extensiveness.
Dry skin is counteracted by moisturizing creams. A new medicine related to Vitamin D appears to be quite effective. Ultraviolet light may help, but must be maintained carefully by your physician. It may lead to long periods without disease. About 25 treatments over 3 months is followed by twice monthly maintenance.