I have PSA without psoriasis . and it is severe and very aggressive , many many joints affected , eye , bowel, hearing loss, its nasty . biologic meds and tons of intraartucular steroid joint injections habe been also immensely helpful esoecially on both sacroiliac joints, and several vertebrae on my spine as well as a steroid epidural for pain relief . physio , aqua yoga (in warm water), yoga specificallt for arhtritis and meditation help .