Be careful though, as psoriasis may develop in areas of sunburn and premature aging that may lead to skin cancer may develop from exposure to ultraviolet radiation. Detergents and antiseptics are not necessary and may irritate. Psoriasis plaques and scales should be kept soft. Special medicated shampoos or liquid lotions may be necessary. Coal Tar shampoo may be purchased over the counter.
Coal tar has been used for many years, the major drawback being it has a strong odor and stains.
It works faster than coal tar and is difficult to use. Fair skinned people do not tolerate it well. Calcipotriol is safe and lessens the itching and scaling. It works well for about one in three people, one in five of those people experience skin irritation. These are clean and soothing.