I have the exact same symptoms with Psoraisis. Although my true psoraisis breakouts are limited, my legs from the knees down always itch with a vengenace! Tannining/Sun exposure on the affected areas really seems to help, as well as lower humidity weather. Hard water can also aggravate the issue. I like Eucerin Calming Cream for a non-medicated solution, and if it's still itchy try getting a steroid cream from your doctor.
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