There is limited scientific research on the effects of black seed oil on psoriasis symptoms in humans. However, some people may still find it beneficial as part of a broader professional treatment plan.
Animal studies suggest that black seed oil could reduce inflammation and other symptoms of psoriasis. Other small studies found that some topical remedies, including black seed oil, could help reduce psoriasis symptoms.
However, it is important to note that this study used black seed oil combined with other ingredients, so there’s no way to know in this case whether black seed oil was behind the beneficial effects.
https://www.healthline.com/health/food-nutrition/black-seed-oil-benefits