In addition to using some of the topical treatments previously mentioned, you can increase the effectiveness of topical ointments by covering them up, a process known as occlusion. When you cover up ointment already applied to your skin, your skin will be more likely to absorb the medication or moisture to provide relief for psoriasis.
To use occlusion to treat psoriasis, apply a topical medication or moisturizer to the affected area of your skin. Next, cover it with plastic wrap, cotton, nylon or a waterproof dressing. But be sure to consult with your physician before attempting to use occlusion with a prescription topical treatment, as there may be risks.