Bath solutions, such as Dead Sea salts, oil, oilated oatmeal, or Epsom salts can help psoriasis by removing scales and easing itching. To try Dead Sea salts and other bath solutions, mix them in the bath as directed, then soak in the tub for about 15 minutes. As soon as you get out of the tub, apply a moisturizer to the skin. Don't expect a lot of improvement, however.