Here is an excellent 2019 Research Paper discussing the use of cannabis in skin inflammation including the factors that cause Psoriasis: https://www.researchgate.net/profile/Andrea_Magnavacca/publication/334086415_Cannabis_sativa_L_extract_and_cannabidiol_inhibit_in_vitro_mediators_of_skin_inflammation_and_wound_injury/links/5da46ecaa6fdcc8fc34fe7c2/Cannabis-sativa-L-extract-and-cannabidiol-inhibit-in-vitro-mediators-of-skin-inflammation-and-wound-injury.pdf Sangiovanni, Enrico, et al. "Cannabis sativa L. extract and cannabidiol inhibit in vitro mediators of skin inflammation and wound injury." Phytotherapy Research (2019). Doji