Thank you for the pictures.
The appearance on the pictures is the typical appearance for psoriasis, so it is not surprising that a Dermatologist did not require a lengthy exam to make a diagnosis.
Psoirasis can be very stubborn in some people. There are a number of topical treatments that can be tried, and it is common to require multiple treatments to have much of an effect. The medicines that she has tried include steroids, a mild antibiotic combined with a steroid, and medicines to moisturize the skin, which try to soften the upper layers of skin to allow the other topical medicines to penetrate better.
Other topical medicines that can be used include anthralin, calcipotriene, and tazarotene. Anthralin inhibits the cells involves in the psoriatic lesion. Calcipotriene is a vitamin D derivative. Tazarotene is a retinoid. If the psoriasis does not respond to topical treatment, the usual next step would be phototherapy, and oral treatments are also available, but she should be tried on other topical medicines before considering these other options.
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