Why does my psoriasis itch and is it supposed to?

Psoriasis and Itch: Whenever a condition causes a chronic itch, it's likely to have an impact on quality of life. That's certainly the case with psoriasis, as evidenced by another scientific study. This study revealed that people with psoriasis reported various symptoms, including itchiness that disrupted their sleep, reduced their sex drive and interfered with their ability to concentrate.