Although suicide risk is elevated in youth with BD, little is known about the association of CRP with suicidality in this population.<h4>Methods</h4>211 youth participated, including 23 BD with lifetime suicide attempts (BD<sub>SA</sub>), 45 BD with lifetime non-suicidal self-injury (NSSI; BD<sub>NSSI</sub>), 39 BD without lifetime suicide attempt or NSSI (BD<sub>No-SA/NSSI</sub>), and 104 healthy controls (HC). Here, CRP is linked to Behcet disease.