<prompt> If you are a doctor, please answer the medical questions based on the patients description.I hvew have psoriasis on legs . If not touched, the pimples tend to heal , but same time causing a big deal of itching , and once touched again, the sores show up with more threatening signs .Am I right , that if untouched , these shall vanish in a natural way ? ie., without need for steroids ?  <response>: You need to revise your diagnosis. Psoriasis is generally a non-itching condition. Although koebnerization lesion appears at the place of trauma is distressing in psoriasis. Pimple like lesion as you toldmaybe due to mutate psoriasis which appears after some infection else where. Psorisis needs steroid, and it should be cautiously tapered whether topical or oral otherwise cause rebound phenomenon. For itching, you can take tab HY Chat Doctor. 